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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/connect.c
3 *
Steve French1080ef72011-02-24 18:07:19 +00004 * Copyright (C) International Business Machines Corp., 2002,2011
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
Steve Frenchfb8c4b12007-07-10 01:16:18 +000019 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
Steve Frenchb8643e12005-04-28 22:41:07 -070031#include <linux/delay.h>
Steve Frenchf1914012005-08-18 09:37:34 -070032#include <linux/completion.h>
Igor Mammedovaaf737a2007-04-03 19:16:43 +000033#include <linux/kthread.h>
Steve French0ae0efa2005-10-10 10:57:19 -070034#include <linux/pagevec.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080035#include <linux/freezer.h>
Igor Mammedov5c2503a2009-04-21 19:31:05 +040036#include <linux/namei.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <asm/uaccess.h>
38#include <asm/processor.h>
Jeff Layton50b64e32009-06-02 06:55:20 -040039#include <linux/inet.h>
Paul Gortmaker143cb492011-07-01 14:23:34 -040040#include <linux/module.h>
Jeff Layton8a8798a2012-01-17 16:09:15 -050041#include <keys/user-type.h>
Steve French0e2beda2009-01-30 21:24:41 +000042#include <net/ipv6.h>
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040043#include <linux/parser.h>
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include "cifspdu.h"
46#include "cifsglob.h"
47#include "cifsproto.h"
48#include "cifs_unicode.h"
49#include "cifs_debug.h"
50#include "cifs_fs_sb.h"
51#include "ntlmssp.h"
52#include "nterr.h"
53#include "rfc1002pdu.h"
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +053054#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56#define CIFS_PORT 445
57#define RFC1001_PORT 139
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059extern mempool_t *cifs_req_poolp;
60
Jeff Layton2de970f2010-10-06 19:51:12 -040061/* FIXME: should these be tunable? */
Jeff Layton9d002df2010-10-06 19:51:11 -040062#define TLINK_ERROR_EXPIRE (1 * HZ)
Jeff Layton2de970f2010-10-06 19:51:12 -040063#define TLINK_IDLE_EXPIRE (600 * HZ)
Jeff Layton9d002df2010-10-06 19:51:11 -040064
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040065enum {
66
67 /* Mount options that take no arguments */
68 Opt_user_xattr, Opt_nouser_xattr,
69 Opt_forceuid, Opt_noforceuid,
Jeff Layton72bd4812012-10-03 16:02:36 -040070 Opt_forcegid, Opt_noforcegid,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040071 Opt_noblocksend, Opt_noautotune,
72 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
73 Opt_mapchars, Opt_nomapchars, Opt_sfu,
74 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
75 Opt_noposixpaths, Opt_nounix,
76 Opt_nocase,
77 Opt_brl, Opt_nobrl,
78 Opt_forcemandatorylock, Opt_setuids,
79 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
80 Opt_nohard, Opt_nosoft,
81 Opt_nointr, Opt_intr,
82 Opt_nostrictsync, Opt_strictsync,
83 Opt_serverino, Opt_noserverino,
84 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
85 Opt_acl, Opt_noacl, Opt_locallease,
Jeff Layton1b359202012-09-19 15:20:27 -070086 Opt_sign, Opt_seal, Opt_noac,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040087 Opt_fsc, Opt_mfsymlinks,
Jeff Laytona0b3df52013-05-24 07:40:59 -040088 Opt_multiuser, Opt_sloppy, Opt_nosharesock,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040089
90 /* Mount options which take numeric value */
91 Opt_backupuid, Opt_backupgid, Opt_uid,
92 Opt_cruid, Opt_gid, Opt_file_mode,
93 Opt_dirmode, Opt_port,
94 Opt_rsize, Opt_wsize, Opt_actimeo,
95
96 /* Mount options which take string value */
97 Opt_user, Opt_pass, Opt_ip,
Jeff Layton73a999f2013-03-22 08:42:57 -040098 Opt_domain, Opt_srcaddr, Opt_iocharset,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040099 Opt_netbiosname, Opt_servern,
Jeff Layton23db65f2012-05-15 12:20:51 -0400100 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400101
102 /* Mount options to be ignored */
103 Opt_ignore,
104
105 /* Options which could be blank */
106 Opt_blank_pass,
Sachin Prabhu4fe9e962012-04-10 18:12:27 +0100107 Opt_blank_user,
108 Opt_blank_ip,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400109
110 Opt_err
111};
112
113static const match_table_t cifs_mount_option_tokens = {
114
115 { Opt_user_xattr, "user_xattr" },
116 { Opt_nouser_xattr, "nouser_xattr" },
117 { Opt_forceuid, "forceuid" },
118 { Opt_noforceuid, "noforceuid" },
Jeff Layton72bd4812012-10-03 16:02:36 -0400119 { Opt_forcegid, "forcegid" },
120 { Opt_noforcegid, "noforcegid" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400121 { Opt_noblocksend, "noblocksend" },
122 { Opt_noautotune, "noautotune" },
123 { Opt_hard, "hard" },
124 { Opt_soft, "soft" },
125 { Opt_perm, "perm" },
126 { Opt_noperm, "noperm" },
127 { Opt_mapchars, "mapchars" },
128 { Opt_nomapchars, "nomapchars" },
129 { Opt_sfu, "sfu" },
130 { Opt_nosfu, "nosfu" },
131 { Opt_nodfs, "nodfs" },
132 { Opt_posixpaths, "posixpaths" },
133 { Opt_noposixpaths, "noposixpaths" },
134 { Opt_nounix, "nounix" },
135 { Opt_nounix, "nolinux" },
136 { Opt_nocase, "nocase" },
137 { Opt_nocase, "ignorecase" },
138 { Opt_brl, "brl" },
139 { Opt_nobrl, "nobrl" },
140 { Opt_nobrl, "nolock" },
141 { Opt_forcemandatorylock, "forcemandatorylock" },
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +0400142 { Opt_forcemandatorylock, "forcemand" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400143 { Opt_setuids, "setuids" },
144 { Opt_nosetuids, "nosetuids" },
145 { Opt_dynperm, "dynperm" },
146 { Opt_nodynperm, "nodynperm" },
147 { Opt_nohard, "nohard" },
148 { Opt_nosoft, "nosoft" },
149 { Opt_nointr, "nointr" },
150 { Opt_intr, "intr" },
151 { Opt_nostrictsync, "nostrictsync" },
152 { Opt_strictsync, "strictsync" },
153 { Opt_serverino, "serverino" },
154 { Opt_noserverino, "noserverino" },
155 { Opt_rwpidforward, "rwpidforward" },
156 { Opt_cifsacl, "cifsacl" },
157 { Opt_nocifsacl, "nocifsacl" },
158 { Opt_acl, "acl" },
159 { Opt_noacl, "noacl" },
160 { Opt_locallease, "locallease" },
161 { Opt_sign, "sign" },
162 { Opt_seal, "seal" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400163 { Opt_noac, "noac" },
164 { Opt_fsc, "fsc" },
165 { Opt_mfsymlinks, "mfsymlinks" },
166 { Opt_multiuser, "multiuser" },
Jeff Laytond8162552012-03-23 14:40:56 -0400167 { Opt_sloppy, "sloppy" },
Jeff Laytona0b3df52013-05-24 07:40:59 -0400168 { Opt_nosharesock, "nosharesock" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400169
170 { Opt_backupuid, "backupuid=%s" },
171 { Opt_backupgid, "backupgid=%s" },
172 { Opt_uid, "uid=%s" },
173 { Opt_cruid, "cruid=%s" },
174 { Opt_gid, "gid=%s" },
175 { Opt_file_mode, "file_mode=%s" },
176 { Opt_dirmode, "dirmode=%s" },
177 { Opt_dirmode, "dir_mode=%s" },
178 { Opt_port, "port=%s" },
179 { Opt_rsize, "rsize=%s" },
180 { Opt_wsize, "wsize=%s" },
181 { Opt_actimeo, "actimeo=%s" },
182
Sachin Prabhu4fe9e962012-04-10 18:12:27 +0100183 { Opt_blank_user, "user=" },
184 { Opt_blank_user, "username=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400185 { Opt_user, "user=%s" },
186 { Opt_user, "username=%s" },
187 { Opt_blank_pass, "pass=" },
Jesper Nilsson3c15b4c2012-11-29 17:31:16 +0100188 { Opt_blank_pass, "password=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400189 { Opt_pass, "pass=%s" },
190 { Opt_pass, "password=%s" },
Sachin Prabhu4fe9e962012-04-10 18:12:27 +0100191 { Opt_blank_ip, "ip=" },
192 { Opt_blank_ip, "addr=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400193 { Opt_ip, "ip=%s" },
194 { Opt_ip, "addr=%s" },
Jeff Layton73a999f2013-03-22 08:42:57 -0400195 { Opt_ignore, "unc=%s" },
196 { Opt_ignore, "target=%s" },
197 { Opt_ignore, "path=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400198 { Opt_domain, "dom=%s" },
199 { Opt_domain, "domain=%s" },
200 { Opt_domain, "workgroup=%s" },
201 { Opt_srcaddr, "srcaddr=%s" },
Jeff Layton73a999f2013-03-22 08:42:57 -0400202 { Opt_ignore, "prefixpath=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400203 { Opt_iocharset, "iocharset=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400204 { Opt_netbiosname, "netbiosname=%s" },
205 { Opt_servern, "servern=%s" },
206 { Opt_ver, "ver=%s" },
Jeff Layton23db65f2012-05-15 12:20:51 -0400207 { Opt_vers, "vers=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400208 { Opt_sec, "sec=%s" },
Jeff Layton15b6a472012-05-16 07:50:15 -0400209 { Opt_cache, "cache=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400210
211 { Opt_ignore, "cred" },
212 { Opt_ignore, "credentials" },
Jeff Laytona557b972012-05-02 14:02:40 -0400213 { Opt_ignore, "cred=%s" },
214 { Opt_ignore, "credentials=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400215 { Opt_ignore, "guest" },
216 { Opt_ignore, "rw" },
217 { Opt_ignore, "ro" },
218 { Opt_ignore, "suid" },
219 { Opt_ignore, "nosuid" },
220 { Opt_ignore, "exec" },
221 { Opt_ignore, "noexec" },
222 { Opt_ignore, "nodev" },
223 { Opt_ignore, "noauto" },
224 { Opt_ignore, "dev" },
225 { Opt_ignore, "mand" },
226 { Opt_ignore, "nomand" },
227 { Opt_ignore, "_netdev" },
228
229 { Opt_err, NULL }
230};
231
232enum {
233 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
234 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
Jeff Layton76596242012-07-23 20:34:17 -0400235 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
236 Opt_sec_ntlmv2i, Opt_sec_lanman,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400237 Opt_sec_none,
238
239 Opt_sec_err
240};
241
242static const match_table_t cifs_secflavor_tokens = {
243 { Opt_sec_krb5, "krb5" },
244 { Opt_sec_krb5i, "krb5i" },
245 { Opt_sec_krb5p, "krb5p" },
246 { Opt_sec_ntlmsspi, "ntlmsspi" },
247 { Opt_sec_ntlmssp, "ntlmssp" },
248 { Opt_ntlm, "ntlm" },
249 { Opt_sec_ntlmi, "ntlmi" },
Jeff Layton76596242012-07-23 20:34:17 -0400250 { Opt_sec_ntlmv2, "nontlm" },
251 { Opt_sec_ntlmv2, "ntlmv2" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400252 { Opt_sec_ntlmv2i, "ntlmv2i" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400253 { Opt_sec_lanman, "lanman" },
254 { Opt_sec_none, "none" },
255
256 { Opt_sec_err, NULL }
257};
258
Jeff Layton15b6a472012-05-16 07:50:15 -0400259/* cache flavors */
260enum {
261 Opt_cache_loose,
262 Opt_cache_strict,
263 Opt_cache_none,
264 Opt_cache_err
265};
266
267static const match_table_t cifs_cacheflavor_tokens = {
268 { Opt_cache_loose, "loose" },
269 { Opt_cache_strict, "strict" },
270 { Opt_cache_none, "none" },
271 { Opt_cache_err, NULL }
272};
273
Jeff Layton23db65f2012-05-15 12:20:51 -0400274static const match_table_t cifs_smb_version_tokens = {
275 { Smb_1, SMB1_VERSION_STRING },
Steve Frenchdd446b12012-11-28 23:21:06 -0600276 { Smb_20, SMB20_VERSION_STRING},
Steve French1080ef72011-02-24 18:07:19 +0000277 { Smb_21, SMB21_VERSION_STRING },
Steve Frenche4aa25e2012-10-01 12:26:22 -0500278 { Smb_30, SMB30_VERSION_STRING },
Steve French20b6d8b2013-06-12 22:48:41 -0500279 { Smb_302, SMB302_VERSION_STRING },
Jeff Layton23db65f2012-05-15 12:20:51 -0400280};
281
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300282static int ip_connect(struct TCP_Server_Info *server);
283static int generic_ip_connect(struct TCP_Server_Info *server);
Jeff Laytonb647c352010-10-28 11:16:44 -0400284static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
Jeff Layton2de970f2010-10-06 19:51:12 -0400285static void cifs_prune_tlinks(struct work_struct *work);
Jeff Laytonb9bce2e2011-07-06 08:10:39 -0400286static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
287 const char *devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Jeff Laytond5c56052008-12-01 18:42:33 -0500289/*
290 * cifs tcp session reconnection
291 *
292 * mark tcp session as reconnecting so temporarily locked
293 * mark all smb sessions as reconnecting for tcp session
294 * reconnect tcp session
295 * wake up waiters on reconnection? - (not needed currently)
296 */
Pavel Shilovsky28ea5292012-05-23 16:18:00 +0400297int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298cifs_reconnect(struct TCP_Server_Info *server)
299{
300 int rc = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500301 struct list_head *tmp, *tmp2;
Steve French96daf2b2011-05-27 04:34:02 +0000302 struct cifs_ses *ses;
303 struct cifs_tcon *tcon;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000304 struct mid_q_entry *mid_entry;
Jeff Layton3c1105d2011-05-22 07:09:13 -0400305 struct list_head retry_list;
Steve French50c2f752007-07-13 00:33:32 +0000306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000308 if (server->tcpStatus == CifsExiting) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000309 /* the demux thread will exit normally
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 next time through the loop */
311 spin_unlock(&GlobalMid_Lock);
312 return rc;
313 } else
314 server->tcpStatus = CifsNeedReconnect;
315 spin_unlock(&GlobalMid_Lock);
316 server->maxBuf = 0;
Pavel Shilovskyaa24d1e2011-12-27 16:23:34 +0400317#ifdef CONFIG_CIFS_SMB2
318 server->max_read = 0;
319#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Joe Perchesf96637b2013-05-04 22:12:25 -0500321 cifs_dbg(FYI, "Reconnecting tcp session\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323 /* before reconnecting the tcp session, mark the smb session (uid)
324 and the tid bad so they are not used until reconnected */
Joe Perchesf96637b2013-05-04 22:12:25 -0500325 cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n",
326 __func__);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530327 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -0500328 list_for_each(tmp, &server->smb_ses_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000329 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
Jeff Layton14fbf502008-11-14 13:53:46 -0500330 ses->need_reconnect = true;
331 ses->ipc_tid = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500332 list_for_each(tmp2, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000333 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500334 tcon->need_reconnect = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530337 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 /* do not want to be sending data on a socket we are freeing */
Joe Perchesf96637b2013-05-04 22:12:25 -0500340 cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
Jeff Layton72ca5452008-12-01 07:09:36 -0500341 mutex_lock(&server->srv_mutex);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000342 if (server->ssocket) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500343 cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
344 server->ssocket->state, server->ssocket->flags);
Trond Myklebust91cf45f2007-11-12 18:10:39 -0800345 kernel_sock_shutdown(server->ssocket, SHUT_WR);
Joe Perchesf96637b2013-05-04 22:12:25 -0500346 cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
347 server->ssocket->state, server->ssocket->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 sock_release(server->ssocket);
349 server->ssocket = NULL;
350 }
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500351 server->sequence_number = 0;
352 server->session_estab = false;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500353 kfree(server->session_key.response);
354 server->session_key.response = NULL;
355 server->session_key.len = 0;
Steve Frenchfda35942011-01-20 18:06:34 +0000356 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500357 mutex_unlock(&server->srv_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500359 /* mark submitted MIDs for retry and issue callback */
Jeff Layton3c1105d2011-05-22 07:09:13 -0400360 INIT_LIST_HEAD(&retry_list);
Joe Perchesf96637b2013-05-04 22:12:25 -0500361 cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 spin_lock(&GlobalMid_Lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500363 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
364 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400365 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
366 mid_entry->mid_state = MID_RETRY_NEEDED;
Jeff Layton3c1105d2011-05-22 07:09:13 -0400367 list_move(&mid_entry->qhead, &retry_list);
368 }
369 spin_unlock(&GlobalMid_Lock);
370
Joe Perchesf96637b2013-05-04 22:12:25 -0500371 cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
Jeff Layton3c1105d2011-05-22 07:09:13 -0400372 list_for_each_safe(tmp, tmp2, &retry_list) {
373 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500374 list_del_init(&mid_entry->qhead);
375 mid_entry->callback(mid_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400378 do {
Steve French6c3d8902006-07-31 22:46:20 +0000379 try_to_freeze();
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300380
381 /* we should try only the port we connected to before */
Jeff Layton73e216a2013-09-05 08:38:10 -0400382 mutex_lock(&server->srv_mutex);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300383 rc = generic_ip_connect(server);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000384 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500385 cifs_dbg(FYI, "reconnect error %d\n", rc);
Steve French0cb766a2005-04-28 22:41:11 -0700386 msleep(3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 } else {
388 atomic_inc(&tcpSesReconnectCount);
389 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000390 if (server->tcpStatus != CifsExiting)
Steve Frenchfd88ce92011-04-12 01:01:14 +0000391 server->tcpStatus = CifsNeedNegotiate;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000392 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 }
Jeff Layton73e216a2013-09-05 08:38:10 -0400394 mutex_unlock(&server->srv_mutex);
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400395 } while (server->tcpStatus == CifsNeedReconnect);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 return rc;
398}
399
Jeff Laytonc74093b2011-01-11 07:24:23 -0500400static void
401cifs_echo_request(struct work_struct *work)
402{
403 int rc;
404 struct TCP_Server_Info *server = container_of(work,
405 struct TCP_Server_Info, echo.work);
406
Jeff Layton247ec9b2011-02-04 17:09:50 -0500407 /*
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400408 * We cannot send an echo if it is disabled or until the
409 * NEGOTIATE_PROTOCOL request is done, which is indicated by
410 * server->ops->need_neg() == true. Also, no need to ping if
411 * we got a response recently.
Jeff Layton247ec9b2011-02-04 17:09:50 -0500412 */
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400413 if (!server->ops->need_neg || server->ops->need_neg(server) ||
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400414 (server->ops->can_echo && !server->ops->can_echo(server)) ||
Jeff Layton247ec9b2011-02-04 17:09:50 -0500415 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
Jeff Laytonc74093b2011-01-11 07:24:23 -0500416 goto requeue_echo;
417
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400418 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
Jeff Laytonc74093b2011-01-11 07:24:23 -0500419 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -0500420 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
421 server->hostname);
Jeff Laytonc74093b2011-01-11 07:24:23 -0500422
423requeue_echo:
Jeff Laytonda472fc2012-03-23 14:40:53 -0400424 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
Jeff Laytonc74093b2011-01-11 07:24:23 -0500425}
426
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400427static bool
Jeff Layton2a37ef92011-10-19 15:29:23 -0400428allocate_buffers(struct TCP_Server_Info *server)
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400429{
Jeff Layton2a37ef92011-10-19 15:29:23 -0400430 if (!server->bigbuf) {
431 server->bigbuf = (char *)cifs_buf_get();
432 if (!server->bigbuf) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500433 cifs_dbg(VFS, "No memory for large SMB response\n");
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400434 msleep(3000);
435 /* retry will check if exiting */
436 return false;
437 }
Jeff Layton2a37ef92011-10-19 15:29:23 -0400438 } else if (server->large_buf) {
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400439 /* we are reusing a dirty large buf, clear its start */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400440 memset(server->bigbuf, 0, HEADER_SIZE(server));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400441 }
442
Jeff Layton2a37ef92011-10-19 15:29:23 -0400443 if (!server->smallbuf) {
444 server->smallbuf = (char *)cifs_small_buf_get();
445 if (!server->smallbuf) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500446 cifs_dbg(VFS, "No memory for SMB response\n");
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400447 msleep(1000);
448 /* retry will check if exiting */
449 return false;
450 }
451 /* beginning of smb buffer is cleared in our buf_get */
452 } else {
453 /* if existing small buf clear beginning */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400454 memset(server->smallbuf, 0, HEADER_SIZE(server));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400455 }
456
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400457 return true;
458}
459
Jeff Laytonba749e62011-10-11 06:41:32 -0400460static bool
461server_unresponsive(struct TCP_Server_Info *server)
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400462{
Pavel Shilovsky6dae51a2012-02-21 16:50:23 +0300463 /*
464 * We need to wait 2 echo intervals to make sure we handle such
465 * situations right:
466 * 1s client sends a normal SMB request
467 * 2s client gets a response
468 * 30s echo workqueue job pops, and decides we got a response recently
469 * and don't need to send another
470 * ...
471 * 65s kernel_recvmsg times out, and we see that we haven't gotten
472 * a response in >60s.
473 */
474 if (server->tcpStatus == CifsGood &&
475 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500476 cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n",
477 server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ);
Jeff Laytonba749e62011-10-11 06:41:32 -0400478 cifs_reconnect(server);
479 wake_up(&server->response_q);
480 return true;
481 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400482
Jeff Laytonba749e62011-10-11 06:41:32 -0400483 return false;
484}
485
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400486/*
487 * kvec_array_init - clone a kvec array, and advance into it
488 * @new: pointer to memory for cloned array
489 * @iov: pointer to original array
490 * @nr_segs: number of members in original array
491 * @bytes: number of bytes to advance into the cloned array
492 *
493 * This function will copy the array provided in iov to a section of memory
494 * and advance the specified number of bytes into the new array. It returns
495 * the number of segments in the new array. "new" must be at least as big as
496 * the original iov array.
497 */
498static unsigned int
499kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
500 size_t bytes)
501{
502 size_t base = 0;
503
504 while (bytes || !iov->iov_len) {
505 int copy = min(bytes, iov->iov_len);
506
507 bytes -= copy;
508 base += copy;
509 if (iov->iov_len == base) {
510 iov++;
511 nr_segs--;
512 base = 0;
513 }
514 }
515 memcpy(new, iov, sizeof(*iov) * nr_segs);
516 new->iov_base += base;
517 new->iov_len -= base;
518 return nr_segs;
519}
520
Jeff Layton1041e3f2011-10-19 15:28:27 -0400521static struct kvec *
522get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
523{
524 struct kvec *new_iov;
525
526 if (server->iov && nr_segs <= server->nr_iov)
527 return server->iov;
528
529 /* not big enough -- allocate a new one and release the old */
530 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
531 if (new_iov) {
532 kfree(server->iov);
533 server->iov = new_iov;
534 server->nr_iov = nr_segs;
535 }
536 return new_iov;
537}
538
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400539int
540cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
541 unsigned int nr_segs, unsigned int to_read)
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400542{
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400543 int length = 0;
544 int total_read;
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400545 unsigned int segs;
Jeff Laytone831e6c2011-10-11 06:41:32 -0400546 struct msghdr smb_msg;
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400547 struct kvec *iov;
548
Jeff Layton1041e3f2011-10-19 15:28:27 -0400549 iov = get_server_iovec(server, nr_segs);
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400550 if (!iov)
551 return -ENOMEM;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400552
Jeff Laytone831e6c2011-10-11 06:41:32 -0400553 smb_msg.msg_control = NULL;
554 smb_msg.msg_controllen = 0;
555
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400556 for (total_read = 0; to_read; total_read += length, to_read -= length) {
Jeff Layton95edcff2011-12-01 20:22:41 -0500557 try_to_freeze();
558
Jeff Laytonba749e62011-10-11 06:41:32 -0400559 if (server_unresponsive(server)) {
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400560 total_read = -EAGAIN;
Jeff Laytonba749e62011-10-11 06:41:32 -0400561 break;
562 }
563
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400564 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
565
566 length = kernel_recvmsg(server->ssocket, &smb_msg,
567 iov, segs, to_read, 0);
568
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400569 if (server->tcpStatus == CifsExiting) {
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400570 total_read = -ESHUTDOWN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400571 break;
572 } else if (server->tcpStatus == CifsNeedReconnect) {
573 cifs_reconnect(server);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400574 total_read = -EAGAIN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400575 break;
576 } else if (length == -ERESTARTSYS ||
577 length == -EAGAIN ||
578 length == -EINTR) {
579 /*
580 * Minimum sleep to prevent looping, allowing socket
581 * to clear and app threads to set tcpStatus
582 * CifsNeedReconnect if server hung.
583 */
584 usleep_range(1000, 2000);
585 length = 0;
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400586 continue;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400587 } else if (length <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500588 cifs_dbg(FYI, "Received no data or error: expecting %d\n"
589 "got %d", to_read, length);
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400590 cifs_reconnect(server);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400591 total_read = -EAGAIN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400592 break;
593 }
594 }
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400595 return total_read;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400596}
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400597
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400598int
599cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
600 unsigned int to_read)
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400601{
602 struct kvec iov;
603
604 iov.iov_base = buf;
605 iov.iov_len = to_read;
606
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400607 return cifs_readv_from_socket(server, &iov, 1, to_read);
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400608}
609
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400610static bool
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400611is_smb_response(struct TCP_Server_Info *server, unsigned char type)
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400612{
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400613 /*
614 * The first byte big endian of the length field,
615 * is actually not part of the length but the type
616 * with the most common, zero, as regular data.
617 */
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400618 switch (type) {
619 case RFC1002_SESSION_MESSAGE:
620 /* Regular SMB response */
621 return true;
622 case RFC1002_SESSION_KEEP_ALIVE:
Joe Perchesf96637b2013-05-04 22:12:25 -0500623 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400624 break;
625 case RFC1002_POSITIVE_SESSION_RESPONSE:
Joe Perchesf96637b2013-05-04 22:12:25 -0500626 cifs_dbg(FYI, "RFC 1002 positive session response\n");
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400627 break;
628 case RFC1002_NEGATIVE_SESSION_RESPONSE:
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400629 /*
630 * We get this from Windows 98 instead of an error on
631 * SMB negprot response.
632 */
Joe Perchesf96637b2013-05-04 22:12:25 -0500633 cifs_dbg(FYI, "RFC 1002 negative session response\n");
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400634 /* give server a second to clean up */
635 msleep(1000);
636 /*
637 * Always try 445 first on reconnect since we get NACK
638 * on some if we ever connected to port 139 (the NACK
639 * is since we do not begin with RFC1001 session
640 * initialize frame).
641 */
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400642 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400643 cifs_reconnect(server);
644 wake_up(&server->response_q);
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400645 break;
646 default:
Joe Perchesf96637b2013-05-04 22:12:25 -0500647 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400648 cifs_reconnect(server);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400649 }
650
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400651 return false;
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400652}
653
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400654void
655dequeue_mid(struct mid_q_entry *mid, bool malformed)
Jeff Laytonea1f4502011-10-19 15:29:05 -0400656{
657#ifdef CONFIG_CIFS_STATS2
658 mid->when_received = jiffies;
659#endif
660 spin_lock(&GlobalMid_Lock);
661 if (!malformed)
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400662 mid->mid_state = MID_RESPONSE_RECEIVED;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400663 else
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400664 mid->mid_state = MID_RESPONSE_MALFORMED;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400665 list_del_init(&mid->qhead);
666 spin_unlock(&GlobalMid_Lock);
667}
668
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400669static void
670handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400671 char *buf, int malformed)
Jeff Laytonea1f4502011-10-19 15:29:05 -0400672{
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400673 if (server->ops->check_trans2 &&
674 server->ops->check_trans2(mid, server, buf, malformed))
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400675 return;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400676 mid->resp_buf = buf;
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400677 mid->large_buf = server->large_buf;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400678 /* Was previous buf put in mpx struct for multi-rsp? */
679 if (!mid->multiRsp) {
680 /* smb buffer will be freed by user thread */
681 if (server->large_buf)
682 server->bigbuf = NULL;
683 else
684 server->smallbuf = NULL;
685 }
Jeff Laytonffc00e22011-10-19 15:29:13 -0400686 dequeue_mid(mid, malformed);
Pavel Shilovskyad69bae2011-08-01 13:19:43 +0400687}
688
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400689static void clean_demultiplex_info(struct TCP_Server_Info *server)
690{
691 int length;
692
693 /* take it off the list, if it's not already */
694 spin_lock(&cifs_tcp_ses_lock);
695 list_del_init(&server->tcp_ses_list);
696 spin_unlock(&cifs_tcp_ses_lock);
697
698 spin_lock(&GlobalMid_Lock);
699 server->tcpStatus = CifsExiting;
700 spin_unlock(&GlobalMid_Lock);
701 wake_up_all(&server->response_q);
702
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400703 /* check if we have blocked requests that need to free */
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300704 spin_lock(&server->req_lock);
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400705 if (server->credits <= 0)
706 server->credits = 1;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300707 spin_unlock(&server->req_lock);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400708 /*
709 * Although there should not be any requests blocked on this queue it
710 * can not hurt to be paranoid and try to wake up requests that may
711 * haven been blocked when more than 50 at time were on the wire to the
712 * same server - they now will see the session is in exit state and get
713 * out of SendReceive.
714 */
715 wake_up_all(&server->request_q);
716 /* give those requests time to exit */
717 msleep(125);
718
719 if (server->ssocket) {
720 sock_release(server->ssocket);
721 server->ssocket = NULL;
722 }
723
724 if (!list_empty(&server->pending_mid_q)) {
725 struct list_head dispose_list;
726 struct mid_q_entry *mid_entry;
727 struct list_head *tmp, *tmp2;
728
729 INIT_LIST_HEAD(&dispose_list);
730 spin_lock(&GlobalMid_Lock);
731 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
732 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -0500733 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400734 mid_entry->mid_state = MID_SHUTDOWN;
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400735 list_move(&mid_entry->qhead, &dispose_list);
736 }
737 spin_unlock(&GlobalMid_Lock);
738
739 /* now walk dispose list and issue callbacks */
740 list_for_each_safe(tmp, tmp2, &dispose_list) {
741 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -0500742 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400743 list_del_init(&mid_entry->qhead);
744 mid_entry->callback(mid_entry);
745 }
746 /* 1/8th of sec is more than enough time for them to exit */
747 msleep(125);
748 }
749
750 if (!list_empty(&server->pending_mid_q)) {
751 /*
752 * mpx threads have not exited yet give them at least the smb
753 * send timeout time for long ops.
754 *
755 * Due to delays on oplock break requests, we need to wait at
756 * least 45 seconds before giving up on a request getting a
757 * response and going ahead and killing cifsd.
758 */
Joe Perchesf96637b2013-05-04 22:12:25 -0500759 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400760 msleep(46000);
761 /*
762 * If threads still have not exited they are probably never
763 * coming home not much else we can do but free the memory.
764 */
765 }
766
767 kfree(server->hostname);
Jeff Layton1041e3f2011-10-19 15:28:27 -0400768 kfree(server->iov);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400769 kfree(server);
770
771 length = atomic_dec_return(&tcpSesAllocCount);
772 if (length > 0)
773 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
774 GFP_KERNEL);
775}
776
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400777static int
Jeff Laytone9097ab2011-10-19 15:29:40 -0400778standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
779{
780 int length;
781 char *buf = server->smallbuf;
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400782 unsigned int pdu_length = get_rfc1002_length(buf);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400783
784 /* make sure this will fit in a large buffer */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400785 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500786 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400787 cifs_reconnect(server);
788 wake_up(&server->response_q);
789 return -EAGAIN;
790 }
791
792 /* switch to large buffer if too big for a small one */
793 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
794 server->large_buf = true;
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400795 memcpy(server->bigbuf, buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400796 buf = server->bigbuf;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400797 }
798
799 /* now read the rest */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400800 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
801 pdu_length - HEADER_SIZE(server) + 1 + 4);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400802 if (length < 0)
803 return length;
804 server->total_read += length;
805
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400806 dump_smb(buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400807
808 /*
809 * We know that we received enough to get to the MID as we
810 * checked the pdu_length earlier. Now check to see
811 * if the rest of the header is OK. We borrow the length
812 * var for the rest of the loop to avoid a new stack var.
813 *
814 * 48 bytes is enough to display the header and a little bit
815 * into the payload for debugging purposes.
816 */
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400817 length = server->ops->check_message(buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400818 if (length != 0)
819 cifs_dump_mem("Bad SMB: ", buf,
820 min_t(unsigned int, server->total_read, 48));
821
Pavel Shilovsky2e44b282012-09-18 16:20:33 -0700822 if (server->ops->is_status_pending &&
823 server->ops->is_status_pending(buf, server, length))
824 return -1;
825
Jeff Laytonff4fa4a2012-02-07 06:31:05 -0500826 if (!mid)
827 return length;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400828
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400829 handle_mid(mid, server, buf, length);
Jeff Laytonff4fa4a2012-02-07 06:31:05 -0500830 return 0;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400831}
832
833static int
Al Viro7c97c202011-06-21 08:51:28 -0400834cifs_demultiplex_thread(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835{
836 int length;
Al Viro7c97c202011-06-21 08:51:28 -0400837 struct TCP_Server_Info *server = p;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400838 unsigned int pdu_length;
839 char *buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 struct task_struct *task_to_wake = NULL;
841 struct mid_q_entry *mid_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 current->flags |= PF_MEMALLOC;
Joe Perchesf96637b2013-05-04 22:12:25 -0500844 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
Jeff Layton93d0ec82008-08-02 08:00:48 -0400845
846 length = atomic_inc_return(&tcpSesAllocCount);
847 if (length > 1)
Steve French26f57362007-08-30 22:09:15 +0000848 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
849 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700851 set_freezable();
Jeff Layton469ee612008-10-16 18:46:39 +0000852 while (server->tcpStatus != CifsExiting) {
Steve Frenchede13272005-08-30 20:10:14 -0700853 if (try_to_freeze())
854 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700855
Jeff Layton2a37ef92011-10-19 15:29:23 -0400856 if (!allocate_buffers(server))
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400857 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700858
Jeff Layton2a37ef92011-10-19 15:29:23 -0400859 server->large_buf = false;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400860 buf = server->smallbuf;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000861 pdu_length = 4; /* enough to get RFC1001 header */
Steve Frenchfda35942011-01-20 18:06:34 +0000862
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400863 length = cifs_read_from_socket(server, buf, pdu_length);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400864 if (length < 0)
Steve Frenchfda35942011-01-20 18:06:34 +0000865 continue;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400866 server->total_read = length;
Steve French67010fb2005-04-28 22:41:09 -0700867
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400868 /*
869 * The right amount was read from socket - 4 bytes,
870 * so we can now interpret the length field.
871 */
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400872 pdu_length = get_rfc1002_length(buf);
Steve French46810cb2005-04-28 22:41:09 -0700873
Joe Perchesf96637b2013-05-04 22:12:25 -0500874 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400875 if (!is_smb_response(server, buf[0]))
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000876 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700877
Jeff Layton89482a52011-10-19 15:28:57 -0400878 /* make sure we have enough to get to the MID */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400879 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500880 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
881 pdu_length);
Jeff Layton89482a52011-10-19 15:28:57 -0400882 cifs_reconnect(server);
883 wake_up(&server->response_q);
884 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700885 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400886
Jeff Layton89482a52011-10-19 15:28:57 -0400887 /* read down to the MID */
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400888 length = cifs_read_from_socket(server, buf + 4,
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400889 HEADER_SIZE(server) - 1 - 4);
Jeff Layton89482a52011-10-19 15:28:57 -0400890 if (length < 0)
891 continue;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400892 server->total_read += length;
Jeff Layton89482a52011-10-19 15:28:57 -0400893
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400894 mid_entry = server->ops->find_mid(server, buf);
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400895
Jeff Layton44d22d82011-10-19 15:29:49 -0400896 if (!mid_entry || !mid_entry->receive)
897 length = standard_receive3(server, mid_entry);
898 else
899 length = mid_entry->receive(server, mid_entry);
900
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400901 if (length < 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700902 continue;
903
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400904 if (server->large_buf)
Jeff Laytone9097ab2011-10-19 15:29:40 -0400905 buf = server->bigbuf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700906
Steve Frenchfda35942011-01-20 18:06:34 +0000907 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500908 if (mid_entry != NULL) {
Jeff Layton2a37ef92011-10-19 15:29:23 -0400909 if (!mid_entry->multiRsp || mid_entry->multiEnd)
910 mid_entry->callback(mid_entry);
Pavel Shilovsky7f0adb52012-05-28 15:50:10 +0400911 } else if (!server->ops->is_oplock_break ||
912 !server->ops->is_oplock_break(buf, server)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500913 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
914 atomic_read(&midCount));
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400915 cifs_dump_mem("Received Data is: ", buf,
916 HEADER_SIZE(server));
Steve French39798772006-05-31 22:40:51 +0000917#ifdef CONFIG_CIFS_DEBUG2
Pavel Shilovsky7f0adb52012-05-28 15:50:10 +0400918 if (server->ops->dump_detail)
919 server->ops->dump_detail(buf);
Steve French39798772006-05-31 22:40:51 +0000920 cifs_dump_mids(server);
921#endif /* CIFS_DEBUG2 */
Steve French50c2f752007-07-13 00:33:32 +0000922
Steve Frenche4eb2952005-04-28 22:41:09 -0700923 }
924 } /* end while !EXITING */
925
Justin P. Mattockfd62cb72011-02-24 22:15:02 -0800926 /* buffer usually freed in free_mid - need to free it here on exit */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400927 cifs_buf_release(server->bigbuf);
928 if (server->smallbuf) /* no sense logging a debug message if NULL */
929 cifs_small_buf_release(server->smallbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400931 task_to_wake = xchg(&server->tsk, NULL);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400932 clean_demultiplex_info(server);
Steve French50c2f752007-07-13 00:33:32 +0000933
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400934 /* if server->tsk was NULL then wait for a signal before exiting */
935 if (!task_to_wake) {
936 set_current_state(TASK_INTERRUPTIBLE);
937 while (!signal_pending(current)) {
938 schedule();
939 set_current_state(TASK_INTERRUPTIBLE);
940 }
941 set_current_state(TASK_RUNNING);
942 }
943
Jeff Layton0468a2c2008-12-01 07:09:35 -0500944 module_put_and_exit(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945}
946
Jeff Laytonc359cf32007-11-16 22:22:06 +0000947/* extract the host portion of the UNC string */
948static char *
949extract_hostname(const char *unc)
950{
951 const char *src;
952 char *dst, *delim;
953 unsigned int len;
954
955 /* skip double chars at beginning of string */
956 /* BB: check validity of these bytes? */
957 src = unc + 2;
958
959 /* delimiter between hostname and sharename is always '\\' now */
960 delim = strchr(src, '\\');
961 if (!delim)
962 return ERR_PTR(-EINVAL);
963
964 len = delim - src;
965 dst = kmalloc((len + 1), GFP_KERNEL);
966 if (dst == NULL)
967 return ERR_PTR(-ENOMEM);
968
969 memcpy(dst, src, len);
970 dst[len] = '\0';
971
972 return dst;
973}
974
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400975static int get_option_ul(substring_t args[], unsigned long *option)
976{
977 int rc;
978 char *string;
979
980 string = match_strdup(args);
981 if (string == NULL)
982 return -ENOMEM;
Sachin Prabhubfa890a2012-04-13 14:04:32 +0100983 rc = kstrtoul(string, 0, option);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400984 kfree(string);
985
986 return rc;
987}
988
Eric W. Biederman3da46562013-02-06 01:37:39 -0800989static int get_option_uid(substring_t args[], kuid_t *result)
990{
991 unsigned long value;
992 kuid_t uid;
993 int rc;
994
995 rc = get_option_ul(args, &value);
996 if (rc)
997 return rc;
998
999 uid = make_kuid(current_user_ns(), value);
1000 if (!uid_valid(uid))
1001 return -EINVAL;
1002
1003 *result = uid;
1004 return 0;
1005}
1006
1007static int get_option_gid(substring_t args[], kgid_t *result)
1008{
1009 unsigned long value;
1010 kgid_t gid;
1011 int rc;
1012
1013 rc = get_option_ul(args, &value);
1014 if (rc)
1015 return rc;
1016
1017 gid = make_kgid(current_user_ns(), value);
1018 if (!gid_valid(gid))
1019 return -EINVAL;
1020
1021 *result = gid;
1022 return 0;
1023}
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001024
1025static int cifs_parse_security_flavors(char *value,
1026 struct smb_vol *vol)
1027{
1028
1029 substring_t args[MAX_OPT_ARGS];
1030
Jeff Layton1e3cc572013-06-10 17:12:23 -05001031 /*
1032 * With mount options, the last one should win. Reset any existing
1033 * settings back to default.
1034 */
1035 vol->sectype = Unspecified;
1036 vol->sign = false;
1037
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001038 switch (match_token(value, cifs_secflavor_tokens, args)) {
Jeff Layton3f618222013-06-12 19:52:14 -05001039 case Opt_sec_krb5p:
1040 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1041 return 1;
1042 case Opt_sec_krb5i:
1043 vol->sign = true;
1044 /* Fallthrough */
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001045 case Opt_sec_krb5:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001046 vol->sectype = Kerberos;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001047 break;
1048 case Opt_sec_ntlmsspi:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001049 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001050 /* Fallthrough */
1051 case Opt_sec_ntlmssp:
1052 vol->sectype = RawNTLMSSP;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001053 break;
1054 case Opt_sec_ntlmi:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001055 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001056 /* Fallthrough */
1057 case Opt_ntlm:
1058 vol->sectype = NTLM;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001059 break;
1060 case Opt_sec_ntlmv2i:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001061 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001062 /* Fallthrough */
1063 case Opt_sec_ntlmv2:
1064 vol->sectype = NTLMv2;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001065 break;
1066#ifdef CONFIG_CIFS_WEAK_PW_HASH
1067 case Opt_sec_lanman:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001068 vol->sectype = LANMAN;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001069 break;
1070#endif
1071 case Opt_sec_none:
1072 vol->nullauth = 1;
1073 break;
1074 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001075 cifs_dbg(VFS, "bad security option: %s\n", value);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001076 return 1;
1077 }
1078
1079 return 0;
1080}
1081
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082static int
Jeff Layton15b6a472012-05-16 07:50:15 -04001083cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1084{
1085 substring_t args[MAX_OPT_ARGS];
1086
1087 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1088 case Opt_cache_loose:
1089 vol->direct_io = false;
1090 vol->strict_io = false;
1091 break;
1092 case Opt_cache_strict:
1093 vol->direct_io = false;
1094 vol->strict_io = true;
1095 break;
1096 case Opt_cache_none:
1097 vol->direct_io = true;
1098 vol->strict_io = false;
1099 break;
1100 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001101 cifs_dbg(VFS, "bad cache= option: %s\n", value);
Jeff Layton15b6a472012-05-16 07:50:15 -04001102 return 1;
1103 }
1104 return 0;
1105}
1106
1107static int
Jeff Layton23db65f2012-05-15 12:20:51 -04001108cifs_parse_smb_version(char *value, struct smb_vol *vol)
1109{
1110 substring_t args[MAX_OPT_ARGS];
1111
1112 switch (match_token(value, cifs_smb_version_tokens, args)) {
1113 case Smb_1:
1114 vol->ops = &smb1_operations;
1115 vol->vals = &smb1_values;
1116 break;
Steve French1080ef72011-02-24 18:07:19 +00001117#ifdef CONFIG_CIFS_SMB2
Steve Frenchdd446b12012-11-28 23:21:06 -06001118 case Smb_20:
Pavel Shilovsky53ef1012013-09-05 16:11:28 +04001119 vol->ops = &smb20_operations;
Steve Frenchdd446b12012-11-28 23:21:06 -06001120 vol->vals = &smb20_values;
1121 break;
Steve French1080ef72011-02-24 18:07:19 +00001122 case Smb_21:
1123 vol->ops = &smb21_operations;
1124 vol->vals = &smb21_values;
1125 break;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001126 case Smb_30:
Steve French38107d42012-12-08 22:08:06 -06001127 vol->ops = &smb30_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001128 vol->vals = &smb30_values;
1129 break;
Steve French20b6d8b2013-06-12 22:48:41 -05001130 case Smb_302:
1131 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1132 vol->vals = &smb302_values;
1133 break;
Steve French1080ef72011-02-24 18:07:19 +00001134#endif
Jeff Layton23db65f2012-05-15 12:20:51 -04001135 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001136 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
Jeff Layton23db65f2012-05-15 12:20:51 -04001137 return 1;
1138 }
1139 return 0;
1140}
1141
Jeff Laytond387a5c2012-12-10 06:10:46 -05001142/*
1143 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1144 * fields with the result. Returns 0 on success and an error otherwise.
1145 */
1146static int
1147cifs_parse_devname(const char *devname, struct smb_vol *vol)
1148{
1149 char *pos;
1150 const char *delims = "/\\";
1151 size_t len;
1152
1153 /* make sure we have a valid UNC double delimiter prefix */
1154 len = strspn(devname, delims);
1155 if (len != 2)
1156 return -EINVAL;
1157
1158 /* find delimiter between host and sharename */
1159 pos = strpbrk(devname + 2, delims);
1160 if (!pos)
1161 return -EINVAL;
1162
1163 /* skip past delimiter */
1164 ++pos;
1165
1166 /* now go until next delimiter or end of string */
1167 len = strcspn(pos, delims);
1168
1169 /* move "pos" up to delimiter or NULL */
1170 pos += len;
1171 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1172 if (!vol->UNC)
1173 return -ENOMEM;
1174
1175 convert_delimiter(vol->UNC, '\\');
1176
1177 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1178 if (!*pos++ || !*pos)
1179 return 0;
1180
1181 vol->prepath = kstrdup(pos, GFP_KERNEL);
1182 if (!vol->prepath)
1183 return -ENOMEM;
1184
1185 return 0;
1186}
1187
Jeff Layton23db65f2012-05-15 12:20:51 -04001188static int
Sean Finneyb9468452011-04-11 13:19:32 +00001189cifs_parse_mount_options(const char *mountdata, const char *devname,
Steve French50c2f752007-07-13 00:33:32 +00001190 struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191{
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001192 char *data, *end;
Vasily Averin957df452011-06-06 11:33:12 +04001193 char *mountdata_copy = NULL, *options;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 unsigned int temp_len, i, j;
1195 char separator[2];
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001196 short int override_uid = -1;
1197 short int override_gid = -1;
1198 bool uid_specified = false;
1199 bool gid_specified = false;
Jeff Laytond8162552012-03-23 14:40:56 -04001200 bool sloppy = false;
1201 char *invalid = NULL;
Jeff Layton88463992010-11-22 15:31:03 -05001202 char *nodename = utsname()->nodename;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001203 char *string = NULL;
1204 char *tmp_end, *value;
1205 char delim;
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001206 bool got_ip = false;
1207 unsigned short port = 0;
1208 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
1210 separator[0] = ',';
Steve French50c2f752007-07-13 00:33:32 +00001211 separator[1] = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001212 delim = separator[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
Jeff Layton6ee95422012-11-26 11:09:57 -05001214 /* ensure we always start with zeroed-out smb_vol */
1215 memset(vol, 0, sizeof(*vol));
1216
Jeff Layton88463992010-11-22 15:31:03 -05001217 /*
1218 * does not have to be perfect mapping since field is
1219 * informational, only used for servers that do not support
1220 * port 445 and it can be overridden at mount time
1221 */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001222 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1223 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
Jeff Layton88463992010-11-22 15:31:03 -05001224 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1225
Jeff Layton1397f2e2011-01-07 11:30:28 -05001226 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
Steve Frencha10faeb22005-08-22 21:38:31 -07001227 /* null target name indicates to use *SMBSERVR default called name
1228 if we end up sending RFC1001 session initialize */
1229 vol->target_rfc1001_name[0] = 0;
Jeff Layton3e4b3e12010-07-19 18:00:17 -04001230 vol->cred_uid = current_uid();
1231 vol->linux_uid = current_uid();
David Howellsa001e5b2008-11-14 10:38:47 +11001232 vol->linux_gid = current_gid();
Jeff Laytonf55ed1a2009-05-26 16:28:11 -04001233
1234 /* default to only allowing write access to owner of the mount */
1235 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236
1237 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
Jeremy Allisonac670552005-06-22 17:26:35 -07001238 /* default is always to request posix paths. */
1239 vol->posix_paths = 1;
Jeff Laytona0c92172009-05-27 15:40:47 -04001240 /* default to using server inode numbers where available */
1241 vol->server_ino = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -07001242
Jeff Layton1b359202012-09-19 15:20:27 -07001243 /* default is to use strict cifs caching semantics */
1244 vol->strict_io = true;
1245
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05301246 vol->actimeo = CIFS_DEF_ACTIMEO;
1247
Jeff Layton23db65f2012-05-15 12:20:51 -04001248 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1249 vol->ops = &smb1_operations;
1250 vol->vals = &smb1_values;
1251
Sean Finneyb9468452011-04-11 13:19:32 +00001252 if (!mountdata)
1253 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Sean Finneyb9468452011-04-11 13:19:32 +00001255 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1256 if (!mountdata_copy)
1257 goto cifs_parse_mount_err;
1258
1259 options = mountdata_copy;
Pavel Shilovsky4906e502011-04-14 22:00:56 +04001260 end = options + strlen(options);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001261
Steve French50c2f752007-07-13 00:33:32 +00001262 if (strncmp(options, "sep=", 4) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001263 if (options[4] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 separator[0] = options[4];
1265 options += 5;
1266 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -05001267 cifs_dbg(FYI, "Null separator not allowed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 }
1269 }
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001270 vol->backupuid_specified = false; /* no backup intent for a user */
1271 vol->backupgid_specified = false; /* no backup intent for a group */
Steve French50c2f752007-07-13 00:33:32 +00001272
Jeff Layton37d4f992013-05-24 07:40:05 -04001273 switch (cifs_parse_devname(devname, vol)) {
1274 case 0:
1275 break;
1276 case -ENOMEM:
1277 cifs_dbg(VFS, "Unable to allocate memory for devname.\n");
1278 goto cifs_parse_mount_err;
1279 case -EINVAL:
1280 cifs_dbg(VFS, "Malformed UNC in devname.\n");
1281 goto cifs_parse_mount_err;
1282 default:
1283 cifs_dbg(VFS, "Unknown error parsing devname.\n");
1284 goto cifs_parse_mount_err;
Jeff Laytond387a5c2012-12-10 06:10:46 -05001285 }
1286
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 while ((data = strsep(&options, separator)) != NULL) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001288 substring_t args[MAX_OPT_ARGS];
1289 unsigned long option;
1290 int token;
1291
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 if (!*data)
1293 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001295 token = match_token(data, cifs_mount_option_tokens, args);
1296
1297 switch (token) {
1298
1299 /* Ingnore the following */
1300 case Opt_ignore:
1301 break;
1302
1303 /* Boolean values */
1304 case Opt_user_xattr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 vol->no_xattr = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001306 break;
1307 case Opt_nouser_xattr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 vol->no_xattr = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001309 break;
1310 case Opt_forceuid:
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001311 override_uid = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001312 break;
1313 case Opt_noforceuid:
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001314 override_uid = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001315 break;
Jeff Layton72bd4812012-10-03 16:02:36 -04001316 case Opt_forcegid:
1317 override_gid = 1;
1318 break;
1319 case Opt_noforcegid:
1320 override_gid = 0;
1321 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001322 case Opt_noblocksend:
Steve Frenchedf1ae42008-10-29 00:47:57 +00001323 vol->noblocksnd = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001324 break;
1325 case Opt_noautotune:
Steve Frenchedf1ae42008-10-29 00:47:57 +00001326 vol->noautotune = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001327 break;
1328 case Opt_hard:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 vol->retry = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001330 break;
1331 case Opt_soft:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 vol->retry = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001333 break;
1334 case Opt_perm:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 vol->noperm = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001336 break;
1337 case Opt_noperm:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 vol->noperm = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001339 break;
1340 case Opt_mapchars:
Steve French6a0b4822005-04-28 22:41:05 -07001341 vol->remap = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001342 break;
1343 case Opt_nomapchars:
Steve French6a0b4822005-04-28 22:41:05 -07001344 vol->remap = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001345 break;
1346 case Opt_sfu:
Steve French50c2f752007-07-13 00:33:32 +00001347 vol->sfu_emul = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001348 break;
1349 case Opt_nosfu:
Steve French50c2f752007-07-13 00:33:32 +00001350 vol->sfu_emul = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001351 break;
1352 case Opt_nodfs:
Steve French2c1b8612008-10-16 18:35:21 +00001353 vol->nodfs = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001354 break;
1355 case Opt_posixpaths:
Jeremy Allisonac670552005-06-22 17:26:35 -07001356 vol->posix_paths = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001357 break;
1358 case Opt_noposixpaths:
Jeremy Allisonac670552005-06-22 17:26:35 -07001359 vol->posix_paths = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001360 break;
1361 case Opt_nounix:
Steve Frenchc18c8422007-07-18 23:21:09 +00001362 vol->no_linux_ext = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001363 break;
1364 case Opt_nocase:
Steve French50c2f752007-07-13 00:33:32 +00001365 vol->nocase = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001366 break;
1367 case Opt_brl:
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001368 vol->nobrl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001369 break;
1370 case Opt_nobrl:
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001371 vol->nobrl = 1;
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +04001372 /*
1373 * turn off mandatory locking in mode
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001374 * if remote locking is turned off since the
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +04001375 * local vfs will do advisory
1376 */
Steve French50c2f752007-07-13 00:33:32 +00001377 if (vol->file_mode ==
1378 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
Steve Frenchd3485d32005-08-19 11:04:29 -07001379 vol->file_mode = S_IALLUGO;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001380 break;
1381 case Opt_forcemandatorylock:
Steve French13a6e422008-12-02 17:24:33 +00001382 vol->mand_lock = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001383 break;
1384 case Opt_setuids:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 vol->setuids = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001386 break;
1387 case Opt_nosetuids:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 vol->setuids = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001389 break;
1390 case Opt_dynperm:
Jeff Laytond0a9c072008-05-12 22:23:49 +00001391 vol->dynperm = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001392 break;
1393 case Opt_nodynperm:
Jeff Laytond0a9c072008-05-12 22:23:49 +00001394 vol->dynperm = false;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001395 break;
1396 case Opt_nohard:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 vol->retry = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001398 break;
1399 case Opt_nosoft:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 vol->retry = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001401 break;
1402 case Opt_nointr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 vol->intr = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001404 break;
1405 case Opt_intr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 vol->intr = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001407 break;
1408 case Opt_nostrictsync:
Steve Frenchbe652442009-02-23 15:21:59 +00001409 vol->nostrictsync = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001410 break;
1411 case Opt_strictsync:
Steve Frenchbe652442009-02-23 15:21:59 +00001412 vol->nostrictsync = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001413 break;
1414 case Opt_serverino:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 vol->server_ino = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001416 break;
1417 case Opt_noserverino:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 vol->server_ino = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001419 break;
1420 case Opt_rwpidforward:
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00001421 vol->rwpidforward = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001422 break;
1423 case Opt_cifsacl:
Steve French0a4b92c2006-01-12 15:44:21 -08001424 vol->cifs_acl = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001425 break;
1426 case Opt_nocifsacl:
Steve French0a4b92c2006-01-12 15:44:21 -08001427 vol->cifs_acl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001428 break;
1429 case Opt_acl:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 vol->no_psx_acl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001431 break;
1432 case Opt_noacl:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433 vol->no_psx_acl = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001434 break;
1435 case Opt_locallease:
Steve French84210e92008-10-23 04:42:37 +00001436 vol->local_lease = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001437 break;
1438 case Opt_sign:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001439 vol->sign = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001440 break;
1441 case Opt_seal:
Steve French95b1cb92008-05-15 16:44:38 +00001442 /* we do not do the following in secFlags because seal
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001443 * is a per tree connection (mount) not a per socket
1444 * or per-smb connection option in the protocol
1445 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1446 */
Steve French95b1cb92008-05-15 16:44:38 +00001447 vol->seal = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001448 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001449 case Opt_noac:
Steve French50c2f752007-07-13 00:33:32 +00001450 printk(KERN_WARNING "CIFS: Mount option noac not "
1451 "supported. Instead set "
1452 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001453 break;
1454 case Opt_fsc:
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301455#ifndef CONFIG_CIFS_FSCACHE
Joe Perchesf96637b2013-05-04 22:12:25 -05001456 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001457 goto cifs_parse_mount_err;
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301458#endif
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301459 vol->fsc = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001460 break;
1461 case Opt_mfsymlinks:
Stefan Metzmacher736a3322010-07-30 14:56:00 +02001462 vol->mfsymlinks = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001463 break;
1464 case Opt_multiuser:
Jeff Layton0eb8a132010-10-06 19:51:12 -04001465 vol->multiuser = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001466 break;
Jeff Laytond8162552012-03-23 14:40:56 -04001467 case Opt_sloppy:
1468 sloppy = true;
1469 break;
Jeff Laytona0b3df52013-05-24 07:40:59 -04001470 case Opt_nosharesock:
1471 vol->nosharesock = true;
1472 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001473
1474 /* Numeric Values */
1475 case Opt_backupuid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001476 if (get_option_uid(args, &vol->backupuid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001477 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1478 __func__);
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001479 goto cifs_parse_mount_err;
1480 }
1481 vol->backupuid_specified = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001482 break;
1483 case Opt_backupgid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001484 if (get_option_gid(args, &vol->backupgid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001485 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1486 __func__);
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001487 goto cifs_parse_mount_err;
1488 }
1489 vol->backupgid_specified = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001490 break;
1491 case Opt_uid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001492 if (get_option_uid(args, &vol->linux_uid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001493 cifs_dbg(VFS, "%s: Invalid uid value\n",
1494 __func__);
Sean Finneyb9468452011-04-11 13:19:32 +00001495 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001497 uid_specified = true;
1498 break;
1499 case Opt_cruid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001500 if (get_option_uid(args, &vol->cred_uid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001501 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1502 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001503 goto cifs_parse_mount_err;
1504 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001505 break;
1506 case Opt_gid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001507 if (get_option_gid(args, &vol->linux_gid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001508 cifs_dbg(VFS, "%s: Invalid gid value\n",
1509 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001510 goto cifs_parse_mount_err;
1511 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001512 gid_specified = true;
1513 break;
1514 case Opt_file_mode:
1515 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001516 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1517 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001518 goto cifs_parse_mount_err;
1519 }
1520 vol->file_mode = option;
1521 break;
1522 case Opt_dirmode:
1523 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001524 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1525 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001526 goto cifs_parse_mount_err;
1527 }
1528 vol->dir_mode = option;
1529 break;
1530 case Opt_port:
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001531 if (get_option_ul(args, &option) ||
1532 option > USHRT_MAX) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001533 cifs_dbg(VFS, "%s: Invalid port value\n",
1534 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001535 goto cifs_parse_mount_err;
1536 }
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001537 port = (unsigned short)option;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001538 break;
1539 case Opt_rsize:
1540 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001541 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1542 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001543 goto cifs_parse_mount_err;
1544 }
1545 vol->rsize = option;
1546 break;
1547 case Opt_wsize:
1548 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001549 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1550 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001551 goto cifs_parse_mount_err;
1552 }
1553 vol->wsize = option;
1554 break;
1555 case Opt_actimeo:
1556 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001557 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1558 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001559 goto cifs_parse_mount_err;
1560 }
1561 vol->actimeo = HZ * option;
1562 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001563 cifs_dbg(VFS, "attribute cache timeout too large\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001564 goto cifs_parse_mount_err;
1565 }
1566 break;
1567
1568 /* String Arguments */
1569
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001570 case Opt_blank_user:
1571 /* null user, ie. anonymous authentication */
1572 vol->nullauth = 1;
1573 vol->username = NULL;
1574 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001575 case Opt_user:
1576 string = match_strdup(args);
1577 if (string == NULL)
1578 goto out_nomem;
1579
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04001580 if (strnlen(string, CIFS_MAX_USERNAME_LEN) >
1581 CIFS_MAX_USERNAME_LEN) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001582 printk(KERN_WARNING "CIFS: username too long\n");
1583 goto cifs_parse_mount_err;
1584 }
1585 vol->username = kstrdup(string, GFP_KERNEL);
Joe Perchesf96637b2013-05-04 22:12:25 -05001586 if (!vol->username)
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001587 goto cifs_parse_mount_err;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001588 break;
1589 case Opt_blank_pass:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001590 /* passwords have to be handled differently
1591 * to allow the character used for deliminator
1592 * to be passed within them
1593 */
1594
Sachin Prabhuc369c9a2013-04-09 18:17:41 +01001595 /*
1596 * Check if this is a case where the password
1597 * starts with a delimiter
1598 */
1599 tmp_end = strchr(data, '=');
1600 tmp_end++;
1601 if (!(tmp_end < end && tmp_end[1] == delim)) {
1602 /* No it is not. Set the password to NULL */
1603 vol->password = NULL;
1604 break;
1605 }
1606 /* Yes it is. Drop down to Opt_pass below.*/
1607 case Opt_pass:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001608 /* Obtain the value string */
1609 value = strchr(data, '=');
Sachin Prabhu10238072012-03-28 18:07:08 +01001610 value++;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001611
1612 /* Set tmp_end to end of the string */
1613 tmp_end = (char *) value + strlen(value);
1614
1615 /* Check if following character is the deliminator
1616 * If yes, we have encountered a double deliminator
1617 * reset the NULL character to the deliminator
1618 */
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301619 if (tmp_end < end && tmp_end[1] == delim) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001620 tmp_end[0] = delim;
1621
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301622 /* Keep iterating until we get to a single
1623 * deliminator OR the end
1624 */
1625 while ((tmp_end = strchr(tmp_end, delim))
1626 != NULL && (tmp_end[1] == delim)) {
1627 tmp_end = (char *) &tmp_end[2];
1628 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001629
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301630 /* Reset var options to point to next element */
1631 if (tmp_end) {
1632 tmp_end[0] = '\0';
1633 options = (char *) &tmp_end[1];
1634 } else
1635 /* Reached the end of the mount option
1636 * string */
1637 options = end;
1638 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001639
1640 /* Now build new password string */
1641 temp_len = strlen(value);
1642 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1643 if (vol->password == NULL) {
1644 printk(KERN_WARNING "CIFS: no memory "
1645 "for password\n");
1646 goto cifs_parse_mount_err;
1647 }
1648
1649 for (i = 0, j = 0; i < temp_len; i++, j++) {
1650 vol->password[j] = value[i];
1651 if ((value[i] == delim) &&
1652 value[i+1] == delim)
1653 /* skip the second deliminator */
1654 i++;
1655 }
1656 vol->password[j] = '\0';
1657 break;
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001658 case Opt_blank_ip:
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001659 /* FIXME: should this be an error instead? */
1660 got_ip = false;
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001661 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001662 case Opt_ip:
1663 string = match_strdup(args);
1664 if (string == NULL)
1665 goto out_nomem;
1666
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001667 if (!cifs_convert_address(dstaddr, string,
1668 strlen(string))) {
1669 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1670 string);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001671 goto cifs_parse_mount_err;
1672 }
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001673 got_ip = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001674 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001675 case Opt_domain:
1676 string = match_strdup(args);
1677 if (string == NULL)
1678 goto out_nomem;
1679
Chen Gang057d6332013-07-19 09:01:36 +08001680 if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN)
1681 == CIFS_MAX_DOMAINNAME_LEN) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001682 printk(KERN_WARNING "CIFS: domain name too"
1683 " long\n");
1684 goto cifs_parse_mount_err;
1685 }
1686
1687 vol->domainname = kstrdup(string, GFP_KERNEL);
1688 if (!vol->domainname) {
1689 printk(KERN_WARNING "CIFS: no memory "
1690 "for domainname\n");
1691 goto cifs_parse_mount_err;
1692 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001693 cifs_dbg(FYI, "Domain name set\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001694 break;
1695 case Opt_srcaddr:
1696 string = match_strdup(args);
1697 if (string == NULL)
1698 goto out_nomem;
1699
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001700 if (!cifs_convert_address(
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001701 (struct sockaddr *)&vol->srcaddr,
1702 string, strlen(string))) {
1703 printk(KERN_WARNING "CIFS: Could not parse"
1704 " srcaddr: %s\n", string);
1705 goto cifs_parse_mount_err;
1706 }
1707 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001708 case Opt_iocharset:
1709 string = match_strdup(args);
1710 if (string == NULL)
1711 goto out_nomem;
1712
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001713 if (strnlen(string, 1024) >= 65) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001714 printk(KERN_WARNING "CIFS: iocharset name "
1715 "too long.\n");
1716 goto cifs_parse_mount_err;
1717 }
1718
1719 if (strnicmp(string, "default", 7) != 0) {
1720 vol->iocharset = kstrdup(string,
1721 GFP_KERNEL);
1722 if (!vol->iocharset) {
1723 printk(KERN_WARNING "CIFS: no memory"
1724 "for charset\n");
1725 goto cifs_parse_mount_err;
1726 }
1727 }
1728 /* if iocharset not set then load_nls_default
1729 * is used by caller
1730 */
Joe Perchesf96637b2013-05-04 22:12:25 -05001731 cifs_dbg(FYI, "iocharset set to %s\n", string);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001732 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001733 case Opt_netbiosname:
1734 string = match_strdup(args);
1735 if (string == NULL)
1736 goto out_nomem;
1737
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001738 memset(vol->source_rfc1001_name, 0x20,
1739 RFC1001_NAME_LEN);
1740 /*
1741 * FIXME: are there cases in which a comma can
1742 * be valid in workstation netbios name (and
1743 * need special handling)?
1744 */
1745 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1746 /* don't ucase netbiosname for user */
1747 if (string[i] == 0)
1748 break;
1749 vol->source_rfc1001_name[i] = string[i];
1750 }
1751 /* The string has 16th byte zero still from
1752 * set at top of the function
1753 */
1754 if (i == RFC1001_NAME_LEN && string[i] != 0)
1755 printk(KERN_WARNING "CIFS: netbiosname"
1756 " longer than 15 truncated.\n");
1757
1758 break;
1759 case Opt_servern:
1760 /* servernetbiosname specified override *SMBSERVER */
1761 string = match_strdup(args);
1762 if (string == NULL)
1763 goto out_nomem;
1764
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001765 /* last byte, type, is 0x20 for servr type */
1766 memset(vol->target_rfc1001_name, 0x20,
1767 RFC1001_NAME_LEN_WITH_NULL);
1768
1769 /* BB are there cases in which a comma can be
1770 valid in this workstation netbios name
1771 (and need special handling)? */
1772
1773 /* user or mount helper must uppercase the
1774 netbios name */
1775 for (i = 0; i < 15; i++) {
1776 if (string[i] == 0)
1777 break;
1778 vol->target_rfc1001_name[i] = string[i];
1779 }
1780 /* The string has 16th byte zero still from
1781 set at top of the function */
1782 if (i == RFC1001_NAME_LEN && string[i] != 0)
1783 printk(KERN_WARNING "CIFS: server net"
1784 "biosname longer than 15 truncated.\n");
1785 break;
1786 case Opt_ver:
1787 string = match_strdup(args);
1788 if (string == NULL)
1789 goto out_nomem;
1790
Jeff Layton5249af32012-05-15 12:04:03 -04001791 if (strnicmp(string, "1", 1) == 0) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001792 /* This is the default */
1793 break;
1794 }
1795 /* For all other value, error */
1796 printk(KERN_WARNING "CIFS: Invalid version"
1797 " specified\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001798 goto cifs_parse_mount_err;
Jeff Layton23db65f2012-05-15 12:20:51 -04001799 case Opt_vers:
1800 string = match_strdup(args);
1801 if (string == NULL)
1802 goto out_nomem;
1803
1804 if (cifs_parse_smb_version(string, vol) != 0)
1805 goto cifs_parse_mount_err;
1806 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001807 case Opt_sec:
1808 string = match_strdup(args);
1809 if (string == NULL)
1810 goto out_nomem;
1811
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001812 if (cifs_parse_security_flavors(string, vol) != 0)
1813 goto cifs_parse_mount_err;
1814 break;
Jeff Layton15b6a472012-05-16 07:50:15 -04001815 case Opt_cache:
1816 string = match_strdup(args);
1817 if (string == NULL)
1818 goto out_nomem;
1819
1820 if (cifs_parse_cache_flavor(string, vol) != 0)
1821 goto cifs_parse_mount_err;
1822 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001823 default:
Jeff Laytond8162552012-03-23 14:40:56 -04001824 /*
1825 * An option we don't recognize. Save it off for later
1826 * if we haven't already found one
1827 */
1828 if (!invalid)
1829 invalid = data;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001830 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001832 /* Free up any allocated string */
1833 kfree(string);
1834 string = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001836
Jeff Laytond8162552012-03-23 14:40:56 -04001837 if (!sloppy && invalid) {
1838 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1839 goto cifs_parse_mount_err;
1840 }
1841
Jeff Layton8a8798a2012-01-17 16:09:15 -05001842#ifndef CONFIG_KEYS
1843 /* Muliuser mounts require CONFIG_KEYS support */
1844 if (vol->multiuser) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001845 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001846 goto cifs_parse_mount_err;
Jeff Layton0eb8a132010-10-06 19:51:12 -04001847 }
Jeff Layton8a8798a2012-01-17 16:09:15 -05001848#endif
Jeff Laytone5e69ab2012-11-25 08:00:42 -05001849 if (!vol->UNC) {
Jeff Layton37d4f992013-05-24 07:40:05 -04001850 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n");
Jeff Laytone5e69ab2012-11-25 08:00:42 -05001851 goto cifs_parse_mount_err;
1852 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001853
Jeff Layton62a1a432012-12-10 06:10:45 -05001854 /* make sure UNC has a share name */
1855 if (!strchr(vol->UNC + 3, '\\')) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001856 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
Jeff Layton62a1a432012-12-10 06:10:45 -05001857 goto cifs_parse_mount_err;
1858 }
1859
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001860 if (!got_ip) {
1861 /* No ip= option specified? Try to get it from UNC */
1862 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1863 strlen(&vol->UNC[2]))) {
1864 printk(KERN_ERR "Unable to determine destination "
1865 "address.\n");
1866 goto cifs_parse_mount_err;
1867 }
1868 }
1869
1870 /* set the port that we got earlier */
1871 cifs_set_port(dstaddr, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001873 if (uid_specified)
1874 vol->override_uid = override_uid;
1875 else if (override_uid == 1)
1876 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1877 "specified with no uid= option.\n");
1878
1879 if (gid_specified)
1880 vol->override_gid = override_gid;
1881 else if (override_gid == 1)
1882 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1883 "specified with no gid= option.\n");
1884
Sean Finneyb9468452011-04-11 13:19:32 +00001885 kfree(mountdata_copy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 return 0;
Sean Finneyb9468452011-04-11 13:19:32 +00001887
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001888out_nomem:
1889 printk(KERN_WARNING "Could not allocate temporary buffer\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001890cifs_parse_mount_err:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001891 kfree(string);
Sean Finneyb9468452011-04-11 13:19:32 +00001892 kfree(mountdata_copy);
1893 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894}
1895
Ben Greear3eb9a882010-09-01 17:06:02 -07001896/** Returns true if srcaddr isn't specified and rhs isn't
1897 * specified, or if srcaddr is specified and
1898 * matches the IP address of the rhs argument.
1899 */
Jeff Layton45151482010-07-06 20:43:02 -04001900static bool
Ben Greear3eb9a882010-09-01 17:06:02 -07001901srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1902{
1903 switch (srcaddr->sa_family) {
1904 case AF_UNSPEC:
1905 return (rhs->sa_family == AF_UNSPEC);
1906 case AF_INET: {
1907 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1908 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1909 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1910 }
1911 case AF_INET6: {
1912 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
Nickolai Zeldoviche3e27752013-01-16 21:36:17 -05001913 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
Ben Greear3eb9a882010-09-01 17:06:02 -07001914 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1915 }
1916 default:
1917 WARN_ON(1);
1918 return false; /* don't expect to be here */
1919 }
1920}
1921
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001922/*
1923 * If no port is specified in addr structure, we try to match with 445 port
1924 * and if it fails - with 139 ports. It should be called only if address
1925 * families of server and addr are equal.
1926 */
1927static bool
1928match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1929{
Steve French6da97912011-03-13 18:55:55 +00001930 __be16 port, *sport;
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001931
1932 switch (addr->sa_family) {
1933 case AF_INET:
1934 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1935 port = ((struct sockaddr_in *) addr)->sin_port;
1936 break;
1937 case AF_INET6:
1938 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1939 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1940 break;
1941 default:
1942 WARN_ON(1);
1943 return false;
1944 }
1945
1946 if (!port) {
1947 port = htons(CIFS_PORT);
1948 if (port == *sport)
1949 return true;
1950
1951 port = htons(RFC1001_PORT);
1952 }
1953
1954 return port == *sport;
1955}
Ben Greear3eb9a882010-09-01 17:06:02 -07001956
1957static bool
1958match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1959 struct sockaddr *srcaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960{
Jeff Layton45151482010-07-06 20:43:02 -04001961 switch (addr->sa_family) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001962 case AF_INET: {
1963 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1964 struct sockaddr_in *srv_addr4 =
1965 (struct sockaddr_in *)&server->dstaddr;
1966
1967 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
Jeff Layton45151482010-07-06 20:43:02 -04001968 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001969 break;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001970 }
1971 case AF_INET6: {
1972 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1973 struct sockaddr_in6 *srv_addr6 =
1974 (struct sockaddr_in6 *)&server->dstaddr;
1975
Jeff Layton45151482010-07-06 20:43:02 -04001976 if (!ipv6_addr_equal(&addr6->sin6_addr,
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001977 &srv_addr6->sin6_addr))
Jeff Layton45151482010-07-06 20:43:02 -04001978 return false;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001979 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
Jeff Layton45151482010-07-06 20:43:02 -04001980 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001981 break;
1982 }
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001983 default:
1984 WARN_ON(1);
1985 return false; /* don't expect to be here */
1986 }
Jeff Layton45151482010-07-06 20:43:02 -04001987
Ben Greear3eb9a882010-09-01 17:06:02 -07001988 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1989 return false;
1990
Jeff Layton45151482010-07-06 20:43:02 -04001991 return true;
1992}
1993
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001994static bool
1995match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1996{
Jeff Layton3f618222013-06-12 19:52:14 -05001997 /*
1998 * The select_sectype function should either return the vol->sectype
1999 * that was specified, or "Unspecified" if that sectype was not
2000 * compatible with the given NEGOTIATE request.
2001 */
2002 if (select_sectype(server, vol->sectype) == Unspecified)
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002003 return false;
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002004
Jeff Layton3f618222013-06-12 19:52:14 -05002005 /*
2006 * Now check if signing mode is acceptable. No need to check
2007 * global_secflags at this point since if MUST_SIGN is set then
2008 * the server->sign had better be too.
2009 */
Jeff Layton38d77c52013-05-26 07:01:00 -04002010 if (vol->sign && !server->sign)
2011 return false;
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002012
2013 return true;
2014}
2015
Jeff Layton9fa114f2012-11-26 11:09:57 -05002016static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002017{
Jeff Layton9fa114f2012-11-26 11:09:57 -05002018 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2019
Jeff Laytona0b3df52013-05-24 07:40:59 -04002020 if (vol->nosharesock)
2021 return 0;
2022
Jeff Layton23db65f2012-05-15 12:20:51 -04002023 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2024 return 0;
2025
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002026 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2027 return 0;
2028
2029 if (!match_address(server, addr,
2030 (struct sockaddr *)&vol->srcaddr))
2031 return 0;
2032
2033 if (!match_port(server, addr))
2034 return 0;
2035
2036 if (!match_security(server, vol))
2037 return 0;
2038
2039 return 1;
2040}
2041
Jeff Layton45151482010-07-06 20:43:02 -04002042static struct TCP_Server_Info *
Jeff Layton9fa114f2012-11-26 11:09:57 -05002043cifs_find_tcp_session(struct smb_vol *vol)
Jeff Layton45151482010-07-06 20:43:02 -04002044{
Jeff Laytone7ddee92008-11-14 13:44:38 -05002045 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302047 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton45151482010-07-06 20:43:02 -04002048 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
Jeff Layton9fa114f2012-11-26 11:09:57 -05002049 if (!match_server(server, vol))
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002050 continue;
2051
Jeff Laytone7ddee92008-11-14 13:44:38 -05002052 ++server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302053 spin_unlock(&cifs_tcp_ses_lock);
Joe Perchesf96637b2013-05-04 22:12:25 -05002054 cifs_dbg(FYI, "Existing tcp session with server found\n");
Jeff Laytone7ddee92008-11-14 13:44:38 -05002055 return server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302057 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 return NULL;
2059}
2060
Jeff Layton14fbf502008-11-14 13:53:46 -05002061static void
Jeff Laytone7ddee92008-11-14 13:44:38 -05002062cifs_put_tcp_session(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063{
Jeff Laytone7ddee92008-11-14 13:44:38 -05002064 struct task_struct *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302066 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002067 if (--server->srv_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302068 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002069 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070 }
Steve Frenchdea570e02008-05-06 22:05:51 +00002071
Rob Landleyf1d0c992011-01-22 15:44:05 -06002072 put_net(cifs_net_ns(server));
2073
Jeff Laytone7ddee92008-11-14 13:44:38 -05002074 list_del_init(&server->tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302075 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002076
Jeff Laytonc74093b2011-01-11 07:24:23 -05002077 cancel_delayed_work_sync(&server->echo);
2078
Jeff Laytone7ddee92008-11-14 13:44:38 -05002079 spin_lock(&GlobalMid_Lock);
2080 server->tcpStatus = CifsExiting;
2081 spin_unlock(&GlobalMid_Lock);
2082
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002083 cifs_crypto_shash_release(server);
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05302084 cifs_fscache_release_client_cookie(server);
2085
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05002086 kfree(server->session_key.response);
2087 server->session_key.response = NULL;
2088 server->session_key.len = 0;
2089
Jeff Laytone7ddee92008-11-14 13:44:38 -05002090 task = xchg(&server->tsk, NULL);
2091 if (task)
2092 force_sig(SIGKILL, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093}
2094
Jeff Layton63c038c2008-12-01 18:41:46 -05002095static struct TCP_Server_Info *
2096cifs_get_tcp_session(struct smb_vol *volume_info)
2097{
2098 struct TCP_Server_Info *tcp_ses = NULL;
Jeff Layton63c038c2008-12-01 18:41:46 -05002099 int rc;
2100
Joe Perchesf96637b2013-05-04 22:12:25 -05002101 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
Jeff Layton63c038c2008-12-01 18:41:46 -05002102
2103 /* see if we already have a matching tcp_ses */
Jeff Layton9fa114f2012-11-26 11:09:57 -05002104 tcp_ses = cifs_find_tcp_session(volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05002105 if (tcp_ses)
2106 return tcp_ses;
2107
2108 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2109 if (!tcp_ses) {
2110 rc = -ENOMEM;
2111 goto out_err;
2112 }
2113
Jeff Layton23db65f2012-05-15 12:20:51 -04002114 tcp_ses->ops = volume_info->ops;
2115 tcp_ses->vals = volume_info->vals;
Rob Landleyf1d0c992011-01-22 15:44:05 -06002116 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
Jeff Layton63c038c2008-12-01 18:41:46 -05002117 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2118 if (IS_ERR(tcp_ses->hostname)) {
2119 rc = PTR_ERR(tcp_ses->hostname);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002120 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002121 }
2122
2123 tcp_ses->noblocksnd = volume_info->noblocksnd;
2124 tcp_ses->noautotune = volume_info->noautotune;
Steve French6a5fa2362010-01-01 01:28:43 +00002125 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +03002126 tcp_ses->in_flight = 0;
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +04002127 tcp_ses->credits = 1;
Jeff Layton63c038c2008-12-01 18:41:46 -05002128 init_waitqueue_head(&tcp_ses->response_q);
2129 init_waitqueue_head(&tcp_ses->request_q);
2130 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2131 mutex_init(&tcp_ses->srv_mutex);
2132 memcpy(tcp_ses->workstation_RFC1001_name,
2133 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2134 memcpy(tcp_ses->server_RFC1001_name,
2135 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05002136 tcp_ses->session_estab = false;
Jeff Layton63c038c2008-12-01 18:41:46 -05002137 tcp_ses->sequence_number = 0;
Steve Frenchfda35942011-01-20 18:06:34 +00002138 tcp_ses->lstrp = jiffies;
Jeff Layton58fa0152012-05-01 17:41:16 -04002139 spin_lock_init(&tcp_ses->req_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002140 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2141 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
Jeff Laytonc74093b2011-01-11 07:24:23 -05002142 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
Jeff Layton9fa114f2012-11-26 11:09:57 -05002143 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2144 sizeof(tcp_ses->srcaddr));
2145 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2146 sizeof(tcp_ses->dstaddr));
Sachin Prabhu39552ea2014-05-13 00:48:12 +01002147#ifdef CONFIG_CIFS_SMB2
2148 get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE);
2149#endif
Jeff Layton63c038c2008-12-01 18:41:46 -05002150 /*
2151 * at this point we are the only ones with the pointer
2152 * to the struct since the kernel thread not created yet
2153 * no need to spinlock this init of tcpStatus or srv_count
2154 */
2155 tcp_ses->tcpStatus = CifsNew;
2156 ++tcp_ses->srv_count;
2157
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002158 rc = ip_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05002159 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002160 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002161 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002162 }
2163
2164 /*
2165 * since we're in a cifs function already, we know that
2166 * this will succeed. No need for try_module_get().
2167 */
2168 __module_get(THIS_MODULE);
Al Viro7c97c202011-06-21 08:51:28 -04002169 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
Jeff Layton63c038c2008-12-01 18:41:46 -05002170 tcp_ses, "cifsd");
2171 if (IS_ERR(tcp_ses->tsk)) {
2172 rc = PTR_ERR(tcp_ses->tsk);
Joe Perchesf96637b2013-05-04 22:12:25 -05002173 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
Jeff Layton63c038c2008-12-01 18:41:46 -05002174 module_put(THIS_MODULE);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002175 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002176 }
Steve Frenchfd88ce92011-04-12 01:01:14 +00002177 tcp_ses->tcpStatus = CifsNeedNegotiate;
Jeff Layton63c038c2008-12-01 18:41:46 -05002178
2179 /* thread spawned, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302180 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002181 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302182 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002183
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05302184 cifs_fscache_get_client_cookie(tcp_ses);
2185
Jeff Laytonc74093b2011-01-11 07:24:23 -05002186 /* queue echo request delayed work */
Jeff Laytonda472fc2012-03-23 14:40:53 -04002187 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
Jeff Laytonc74093b2011-01-11 07:24:23 -05002188
Jeff Layton63c038c2008-12-01 18:41:46 -05002189 return tcp_ses;
2190
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002191out_err_crypto_release:
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002192 cifs_crypto_shash_release(tcp_ses);
2193
Rob Landleyf1d0c992011-01-22 15:44:05 -06002194 put_net(cifs_net_ns(tcp_ses));
2195
Jeff Layton63c038c2008-12-01 18:41:46 -05002196out_err:
2197 if (tcp_ses) {
Steve French8347a5c2009-10-06 18:31:29 +00002198 if (!IS_ERR(tcp_ses->hostname))
2199 kfree(tcp_ses->hostname);
Jeff Layton63c038c2008-12-01 18:41:46 -05002200 if (tcp_ses->ssocket)
2201 sock_release(tcp_ses->ssocket);
2202 kfree(tcp_ses);
2203 }
2204 return ERR_PTR(rc);
2205}
2206
Steve French96daf2b2011-05-27 04:34:02 +00002207static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002208{
Jeff Layton3f618222013-06-12 19:52:14 -05002209 if (vol->sectype != Unspecified &&
2210 vol->sectype != ses->sectype)
2211 return 0;
2212
2213 switch (ses->sectype) {
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002214 case Kerberos:
Eric W. Biederman64ed39d2013-02-06 02:30:39 -08002215 if (!uid_eq(vol->cred_uid, ses->cred_uid))
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002216 return 0;
2217 break;
2218 default:
Jeff Layton04febab2012-01-17 16:09:15 -05002219 /* NULL username means anonymous session */
2220 if (ses->user_name == NULL) {
2221 if (!vol->nullauth)
2222 return 0;
2223 break;
2224 }
2225
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002226 /* anything else takes username/password */
Jeff Layton04febab2012-01-17 16:09:15 -05002227 if (strncmp(ses->user_name,
2228 vol->username ? vol->username : "",
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04002229 CIFS_MAX_USERNAME_LEN))
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002230 return 0;
Jeff Layton08b37d52014-05-23 06:53:10 -04002231 if ((vol->username && strlen(vol->username) != 0) &&
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002232 ses->password != NULL &&
2233 strncmp(ses->password,
2234 vol->password ? vol->password : "",
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04002235 CIFS_MAX_PASSWORD_LEN))
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002236 return 0;
2237 }
2238 return 1;
2239}
2240
Steve French96daf2b2011-05-27 04:34:02 +00002241static struct cifs_ses *
Jeff Layton4ff67b72010-07-06 20:43:02 -04002242cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243{
Steve French96daf2b2011-05-27 04:34:02 +00002244 struct cifs_ses *ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302246 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton4ff67b72010-07-06 20:43:02 -04002247 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002248 if (ses->status == CifsExiting)
2249 continue;
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002250 if (!match_session(ses, vol))
2251 continue;
Jeff Layton14fbf502008-11-14 13:53:46 -05002252 ++ses->ses_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302253 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002254 return ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302256 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257 return NULL;
2258}
2259
Jeff Layton14fbf502008-11-14 13:53:46 -05002260static void
Steve French96daf2b2011-05-27 04:34:02 +00002261cifs_put_smb_ses(struct cifs_ses *ses)
Jeff Layton14fbf502008-11-14 13:53:46 -05002262{
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002263 unsigned int rc, xid;
Jeff Layton14fbf502008-11-14 13:53:46 -05002264 struct TCP_Server_Info *server = ses->server;
2265
Joe Perchesf96637b2013-05-04 22:12:25 -05002266 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002267
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302268 spin_lock(&cifs_tcp_ses_lock);
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002269 if (ses->status == CifsExiting) {
2270 spin_unlock(&cifs_tcp_ses_lock);
2271 return;
2272 }
Jeff Layton14fbf502008-11-14 13:53:46 -05002273 if (--ses->ses_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302274 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002275 return;
2276 }
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002277 if (ses->status == CifsGood)
2278 ses->status = CifsExiting;
2279 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002280
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002281 if (ses->status == CifsExiting && server->ops->logoff) {
2282 xid = get_xid();
2283 rc = server->ops->logoff(xid, ses);
2284 if (rc)
2285 cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n",
2286 __func__, rc);
2287 _free_xid(xid);
2288 }
2289
2290 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002291 list_del_init(&ses->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302292 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002293
Jeff Layton14fbf502008-11-14 13:53:46 -05002294 sesInfoFree(ses);
2295 cifs_put_tcp_session(server);
2296}
2297
Jeff Layton8a8798a2012-01-17 16:09:15 -05002298#ifdef CONFIG_KEYS
2299
Chen Gang057d6332013-07-19 09:01:36 +08002300/* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
2301#define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
Jeff Layton8a8798a2012-01-17 16:09:15 -05002302
2303/* Populate username and pw fields from keyring if possible */
2304static int
2305cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2306{
2307 int rc = 0;
2308 char *desc, *delim, *payload;
2309 ssize_t len;
2310 struct key *key;
2311 struct TCP_Server_Info *server = ses->server;
2312 struct sockaddr_in *sa;
2313 struct sockaddr_in6 *sa6;
2314 struct user_key_payload *upayload;
2315
2316 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2317 if (!desc)
2318 return -ENOMEM;
2319
2320 /* try to find an address key first */
2321 switch (server->dstaddr.ss_family) {
2322 case AF_INET:
2323 sa = (struct sockaddr_in *)&server->dstaddr;
2324 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2325 break;
2326 case AF_INET6:
2327 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2328 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2329 break;
2330 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05002331 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2332 server->dstaddr.ss_family);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002333 rc = -EINVAL;
2334 goto out_err;
2335 }
2336
Joe Perchesf96637b2013-05-04 22:12:25 -05002337 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002338 key = request_key(&key_type_logon, desc, "");
2339 if (IS_ERR(key)) {
2340 if (!ses->domainName) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002341 cifs_dbg(FYI, "domainName is NULL\n");
Jeff Layton8a8798a2012-01-17 16:09:15 -05002342 rc = PTR_ERR(key);
2343 goto out_err;
2344 }
2345
2346 /* didn't work, try to find a domain key */
2347 sprintf(desc, "cifs:d:%s", ses->domainName);
Joe Perchesf96637b2013-05-04 22:12:25 -05002348 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002349 key = request_key(&key_type_logon, desc, "");
2350 if (IS_ERR(key)) {
2351 rc = PTR_ERR(key);
2352 goto out_err;
2353 }
2354 }
2355
2356 down_read(&key->sem);
2357 upayload = key->payload.data;
2358 if (IS_ERR_OR_NULL(upayload)) {
Jeff Layton4edc53c2012-02-07 06:30:51 -05002359 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
Jeff Layton8a8798a2012-01-17 16:09:15 -05002360 goto out_key_put;
2361 }
2362
2363 /* find first : in payload */
2364 payload = (char *)upayload->data;
2365 delim = strnchr(payload, upayload->datalen, ':');
Joe Perchesf96637b2013-05-04 22:12:25 -05002366 cifs_dbg(FYI, "payload=%s\n", payload);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002367 if (!delim) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002368 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2369 upayload->datalen);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002370 rc = -EINVAL;
2371 goto out_key_put;
2372 }
2373
2374 len = delim - payload;
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04002375 if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002376 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2377 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002378 rc = -EINVAL;
2379 goto out_key_put;
2380 }
2381
2382 vol->username = kstrndup(payload, len, GFP_KERNEL);
2383 if (!vol->username) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002384 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2385 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002386 rc = -ENOMEM;
2387 goto out_key_put;
2388 }
Joe Perchesf96637b2013-05-04 22:12:25 -05002389 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002390
2391 len = key->datalen - (len + 1);
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04002392 if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002393 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002394 rc = -EINVAL;
2395 kfree(vol->username);
2396 vol->username = NULL;
2397 goto out_key_put;
2398 }
2399
2400 ++delim;
2401 vol->password = kstrndup(delim, len, GFP_KERNEL);
2402 if (!vol->password) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002403 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2404 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002405 rc = -ENOMEM;
2406 kfree(vol->username);
2407 vol->username = NULL;
2408 goto out_key_put;
2409 }
2410
2411out_key_put:
2412 up_read(&key->sem);
2413 key_put(key);
2414out_err:
2415 kfree(desc);
Joe Perchesf96637b2013-05-04 22:12:25 -05002416 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002417 return rc;
2418}
2419#else /* ! CONFIG_KEYS */
2420static inline int
2421cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2422 struct cifs_ses *ses __attribute__((unused)))
2423{
2424 return -ENOSYS;
2425}
2426#endif /* CONFIG_KEYS */
2427
Steve French96daf2b2011-05-27 04:34:02 +00002428static struct cifs_ses *
Jeff Layton36988c72010-04-24 07:57:43 -04002429cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2430{
Pavel Shilovsky286170a2012-05-25 10:43:58 +04002431 int rc = -ENOMEM;
2432 unsigned int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002433 struct cifs_ses *ses;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002434 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2435 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
Jeff Layton36988c72010-04-24 07:57:43 -04002436
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002437 xid = get_xid();
Jeff Layton36988c72010-04-24 07:57:43 -04002438
Jeff Layton4ff67b72010-07-06 20:43:02 -04002439 ses = cifs_find_smb_ses(server, volume_info);
Jeff Layton36988c72010-04-24 07:57:43 -04002440 if (ses) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002441 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2442 ses->status);
Jeff Layton36988c72010-04-24 07:57:43 -04002443
Jeff Layton36988c72010-04-24 07:57:43 -04002444 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002445 rc = cifs_negotiate_protocol(xid, ses);
2446 if (rc) {
2447 mutex_unlock(&ses->session_mutex);
2448 /* problem -- put our ses reference */
2449 cifs_put_smb_ses(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002450 free_xid(xid);
Jeff Layton198b5682010-04-24 07:57:48 -04002451 return ERR_PTR(rc);
2452 }
Jeff Layton36988c72010-04-24 07:57:43 -04002453 if (ses->need_reconnect) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002454 cifs_dbg(FYI, "Session needs reconnect\n");
Jeff Layton36988c72010-04-24 07:57:43 -04002455 rc = cifs_setup_session(xid, ses,
2456 volume_info->local_nls);
2457 if (rc) {
2458 mutex_unlock(&ses->session_mutex);
2459 /* problem -- put our reference */
2460 cifs_put_smb_ses(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002461 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002462 return ERR_PTR(rc);
2463 }
2464 }
2465 mutex_unlock(&ses->session_mutex);
Jeff Layton460cf342010-09-14 11:38:24 -04002466
2467 /* existing SMB ses has a server reference already */
2468 cifs_put_tcp_session(server);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002469 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002470 return ses;
2471 }
2472
Joe Perchesf96637b2013-05-04 22:12:25 -05002473 cifs_dbg(FYI, "Existing smb sess not found\n");
Jeff Layton36988c72010-04-24 07:57:43 -04002474 ses = sesInfoAlloc();
2475 if (ses == NULL)
2476 goto get_ses_fail;
2477
2478 /* new SMB session uses our server ref */
2479 ses->server = server;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002480 if (server->dstaddr.ss_family == AF_INET6)
2481 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04002482 else
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002483 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04002484
Steve French8727c8a2011-02-25 01:11:56 -06002485 if (volume_info->username) {
2486 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2487 if (!ses->user_name)
2488 goto get_ses_fail;
2489 }
Jeff Layton36988c72010-04-24 07:57:43 -04002490
2491 /* volume_info->password freed at unmount */
2492 if (volume_info->password) {
2493 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2494 if (!ses->password)
2495 goto get_ses_fail;
2496 }
2497 if (volume_info->domainname) {
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05002498 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2499 if (!ses->domainName)
2500 goto get_ses_fail;
Jeff Layton36988c72010-04-24 07:57:43 -04002501 }
Jeff Layton3e4b3e12010-07-19 18:00:17 -04002502 ses->cred_uid = volume_info->cred_uid;
Jeff Layton36988c72010-04-24 07:57:43 -04002503 ses->linux_uid = volume_info->linux_uid;
Steve Frenchd9b94202011-04-12 01:24:57 +00002504
Jeff Layton28e11bd2013-05-26 07:01:00 -04002505 ses->sectype = volume_info->sectype;
2506 ses->sign = volume_info->sign;
Jeff Layton36988c72010-04-24 07:57:43 -04002507
2508 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002509 rc = cifs_negotiate_protocol(xid, ses);
2510 if (!rc)
2511 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
Jeff Layton36988c72010-04-24 07:57:43 -04002512 mutex_unlock(&ses->session_mutex);
Steve Frenchc8e56f12010-09-08 21:10:58 +00002513 if (rc)
Jeff Layton36988c72010-04-24 07:57:43 -04002514 goto get_ses_fail;
2515
2516 /* success, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302517 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002518 list_add(&ses->smb_ses_list, &server->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302519 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002520
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002521 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002522 return ses;
2523
2524get_ses_fail:
2525 sesInfoFree(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002526 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002527 return ERR_PTR(rc);
2528}
2529
Steve French96daf2b2011-05-27 04:34:02 +00002530static int match_tcon(struct cifs_tcon *tcon, const char *unc)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002531{
2532 if (tcon->tidStatus == CifsExiting)
2533 return 0;
2534 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2535 return 0;
2536 return 1;
2537}
2538
Steve French96daf2b2011-05-27 04:34:02 +00002539static struct cifs_tcon *
2540cifs_find_tcon(struct cifs_ses *ses, const char *unc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541{
2542 struct list_head *tmp;
Steve French96daf2b2011-05-27 04:34:02 +00002543 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002544
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302545 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002546 list_for_each(tmp, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +00002547 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002548 if (!match_tcon(tcon, unc))
Jeff Laytonf1987b42008-11-15 11:12:47 -05002549 continue;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002550 ++tcon->tc_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302551 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552 return tcon;
2553 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302554 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002555 return NULL;
2556}
2557
Jeff Laytonf1987b42008-11-15 11:12:47 -05002558static void
Steve French96daf2b2011-05-27 04:34:02 +00002559cifs_put_tcon(struct cifs_tcon *tcon)
Jeff Laytonf1987b42008-11-15 11:12:47 -05002560{
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002561 unsigned int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002562 struct cifs_ses *ses = tcon->ses;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002563
Joe Perchesf96637b2013-05-04 22:12:25 -05002564 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302565 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002566 if (--tcon->tc_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302567 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002568 return;
2569 }
2570
2571 list_del_init(&tcon->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302572 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002573
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002574 xid = get_xid();
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002575 if (ses->server->ops->tree_disconnect)
2576 ses->server->ops->tree_disconnect(xid, tcon);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002577 _free_xid(xid);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002578
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302579 cifs_fscache_release_super_cookie(tcon);
Steve French9f841592010-07-23 20:37:53 +00002580 tconInfoFree(tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002581 cifs_put_smb_ses(ses);
2582}
2583
Steve French96daf2b2011-05-27 04:34:02 +00002584static struct cifs_tcon *
2585cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
Jeff Laytond00c28d2010-04-24 07:57:44 -04002586{
2587 int rc, xid;
Steve French96daf2b2011-05-27 04:34:02 +00002588 struct cifs_tcon *tcon;
Jeff Laytond00c28d2010-04-24 07:57:44 -04002589
2590 tcon = cifs_find_tcon(ses, volume_info->UNC);
2591 if (tcon) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002592 cifs_dbg(FYI, "Found match on UNC path\n");
Jeff Laytond00c28d2010-04-24 07:57:44 -04002593 /* existing tcon already has a reference */
2594 cifs_put_smb_ses(ses);
2595 if (tcon->seal != volume_info->seal)
Joe Perchesf96637b2013-05-04 22:12:25 -05002596 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
Jeff Laytond00c28d2010-04-24 07:57:44 -04002597 return tcon;
2598 }
2599
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002600 if (!ses->server->ops->tree_connect) {
2601 rc = -ENOSYS;
2602 goto out_fail;
2603 }
2604
Jeff Laytond00c28d2010-04-24 07:57:44 -04002605 tcon = tconInfoAlloc();
2606 if (tcon == NULL) {
2607 rc = -ENOMEM;
2608 goto out_fail;
2609 }
2610
2611 tcon->ses = ses;
2612 if (volume_info->password) {
2613 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2614 if (!tcon->password) {
2615 rc = -ENOMEM;
2616 goto out_fail;
2617 }
2618 }
2619
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002620 /*
2621 * BB Do we need to wrap session_mutex around this TCon call and Unix
2622 * SetFS as we do on SessSetup and reconnect?
2623 */
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002624 xid = get_xid();
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002625 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2626 volume_info->local_nls);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002627 free_xid(xid);
Joe Perchesf96637b2013-05-04 22:12:25 -05002628 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002629 if (rc)
2630 goto out_fail;
2631
2632 if (volume_info->nodfs) {
2633 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
Joe Perchesf96637b2013-05-04 22:12:25 -05002634 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002635 }
2636 tcon->seal = volume_info->seal;
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002637 /*
2638 * We can have only one retry value for a connection to a share so for
2639 * resources mounted more than once to the same server share the last
2640 * value passed in for the retry flag is used.
2641 */
Jeff Laytond00c28d2010-04-24 07:57:44 -04002642 tcon->retry = volume_info->retry;
2643 tcon->nocase = volume_info->nocase;
2644 tcon->local_lease = volume_info->local_lease;
Pavel Shilovsky233839b2012-09-19 06:22:45 -07002645 INIT_LIST_HEAD(&tcon->pending_opens);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002646
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302647 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002648 list_add(&tcon->tcon_list, &ses->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302649 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002650
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302651 cifs_fscache_get_super_cookie(tcon);
2652
Jeff Laytond00c28d2010-04-24 07:57:44 -04002653 return tcon;
2654
2655out_fail:
2656 tconInfoFree(tcon);
2657 return ERR_PTR(rc);
2658}
2659
Jeff Layton9d002df2010-10-06 19:51:11 -04002660void
2661cifs_put_tlink(struct tcon_link *tlink)
2662{
2663 if (!tlink || IS_ERR(tlink))
2664 return;
2665
2666 if (!atomic_dec_and_test(&tlink->tl_count) ||
2667 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2668 tlink->tl_time = jiffies;
2669 return;
2670 }
2671
2672 if (!IS_ERR(tlink_tcon(tlink)))
2673 cifs_put_tcon(tlink_tcon(tlink));
2674 kfree(tlink);
2675 return;
2676}
Jeff Laytond00c28d2010-04-24 07:57:44 -04002677
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002678static inline struct tcon_link *
Pavel Shilovskycd518752011-06-09 12:58:53 +04002679cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2680{
2681 return cifs_sb->master_tlink;
2682}
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002683
2684static int
2685compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2686{
2687 struct cifs_sb_info *old = CIFS_SB(sb);
2688 struct cifs_sb_info *new = mnt_data->cifs_sb;
2689
2690 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2691 return 0;
2692
2693 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2694 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2695 return 0;
2696
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002697 /*
Jeff Layton5eba8ab2011-10-19 15:30:26 -04002698 * We want to share sb only if we don't specify an r/wsize or
2699 * specified r/wsize is greater than or equal to existing one.
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002700 */
2701 if (new->wsize && new->wsize < old->wsize)
2702 return 0;
2703
Jeff Layton5eba8ab2011-10-19 15:30:26 -04002704 if (new->rsize && new->rsize < old->rsize)
2705 return 0;
2706
Eric W. Biederman1f682332013-02-06 01:20:20 -08002707 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002708 return 0;
2709
2710 if (old->mnt_file_mode != new->mnt_file_mode ||
2711 old->mnt_dir_mode != new->mnt_dir_mode)
2712 return 0;
2713
2714 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2715 return 0;
2716
2717 if (old->actimeo != new->actimeo)
2718 return 0;
2719
2720 return 1;
2721}
2722
2723int
2724cifs_match_super(struct super_block *sb, void *data)
2725{
2726 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2727 struct smb_vol *volume_info;
2728 struct cifs_sb_info *cifs_sb;
2729 struct TCP_Server_Info *tcp_srv;
Steve French96daf2b2011-05-27 04:34:02 +00002730 struct cifs_ses *ses;
2731 struct cifs_tcon *tcon;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002732 struct tcon_link *tlink;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002733 int rc = 0;
2734
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002735 spin_lock(&cifs_tcp_ses_lock);
2736 cifs_sb = CIFS_SB(sb);
2737 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2738 if (IS_ERR(tlink)) {
2739 spin_unlock(&cifs_tcp_ses_lock);
2740 return rc;
2741 }
2742 tcon = tlink_tcon(tlink);
2743 ses = tcon->ses;
2744 tcp_srv = ses->server;
2745
2746 volume_info = mnt_data->vol;
2747
Jeff Layton9fa114f2012-11-26 11:09:57 -05002748 if (!match_server(tcp_srv, volume_info) ||
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002749 !match_session(ses, volume_info) ||
2750 !match_tcon(tcon, volume_info->UNC)) {
2751 rc = 0;
2752 goto out;
2753 }
2754
2755 rc = compare_mount_options(sb, mnt_data);
2756out:
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002757 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf484b5d02011-07-11 10:16:34 -04002758 cifs_put_tlink(tlink);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002759 return rc;
2760}
2761
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762int
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002763get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002764 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2765 struct dfs_info3_param **referrals, int remap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766{
2767 char *temp_unc;
2768 int rc = 0;
2769
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002770 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002771 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002773 *num_referrals = 0;
2774 *referrals = NULL;
2775
2776 if (ses->ipc_tid == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002777 temp_unc = kmalloc(2 /* for slashes */ +
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002778 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2779 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780 if (temp_unc == NULL)
2781 return -ENOMEM;
2782 temp_unc[0] = '\\';
2783 temp_unc[1] = '\\';
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002784 strcpy(temp_unc + 2, ses->serverName);
2785 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2786 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2787 nls_codepage);
Joe Perchesf96637b2013-05-04 22:12:25 -05002788 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002789 kfree(temp_unc);
2790 }
2791 if (rc == 0)
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002792 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2793 referrals, num_referrals,
2794 nls_codepage, remap);
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002795 /*
2796 * BB - map targetUNCs to dfs_info3 structures, here or in
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002797 * ses->server->ops->get_dfs_refer.
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002798 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002799
2800 return rc;
2801}
2802
Jeff Layton09e50d52008-07-23 10:11:19 -04002803#ifdef CONFIG_DEBUG_LOCK_ALLOC
2804static struct lock_class_key cifs_key[2];
2805static struct lock_class_key cifs_slock_key[2];
2806
2807static inline void
2808cifs_reclassify_socket4(struct socket *sock)
2809{
2810 struct sock *sk = sock->sk;
2811 BUG_ON(sock_owned_by_user(sk));
2812 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2813 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2814}
2815
2816static inline void
2817cifs_reclassify_socket6(struct socket *sock)
2818{
2819 struct sock *sk = sock->sk;
2820 BUG_ON(sock_owned_by_user(sk));
2821 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2822 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2823}
2824#else
2825static inline void
2826cifs_reclassify_socket4(struct socket *sock)
2827{
2828}
2829
2830static inline void
2831cifs_reclassify_socket6(struct socket *sock)
2832{
2833}
2834#endif
2835
Linus Torvalds1da177e2005-04-16 15:20:36 -07002836/* See RFC1001 section 14 on representation of Netbios names */
Steve French50c2f752007-07-13 00:33:32 +00002837static void rfc1002mangle(char *target, char *source, unsigned int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838{
Steve French50c2f752007-07-13 00:33:32 +00002839 unsigned int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002840
Steve French50c2f752007-07-13 00:33:32 +00002841 for (i = 0, j = 0; i < (length); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002842 /* mask a nibble at a time and encode */
2843 target[j] = 'A' + (0x0F & (source[i] >> 4));
2844 target[j+1] = 'A' + (0x0F & source[i]);
Steve French50c2f752007-07-13 00:33:32 +00002845 j += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002846 }
2847
2848}
2849
Ben Greear3eb9a882010-09-01 17:06:02 -07002850static int
2851bind_socket(struct TCP_Server_Info *server)
2852{
2853 int rc = 0;
2854 if (server->srcaddr.ss_family != AF_UNSPEC) {
2855 /* Bind to the specified local IP address */
2856 struct socket *socket = server->ssocket;
2857 rc = socket->ops->bind(socket,
2858 (struct sockaddr *) &server->srcaddr,
2859 sizeof(server->srcaddr));
2860 if (rc < 0) {
2861 struct sockaddr_in *saddr4;
2862 struct sockaddr_in6 *saddr6;
2863 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2864 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2865 if (saddr6->sin6_family == AF_INET6)
Joe Perchesf96637b2013-05-04 22:12:25 -05002866 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2867 &saddr6->sin6_addr, rc);
Ben Greear3eb9a882010-09-01 17:06:02 -07002868 else
Joe Perchesf96637b2013-05-04 22:12:25 -05002869 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2870 &saddr4->sin_addr.s_addr, rc);
Ben Greear3eb9a882010-09-01 17:06:02 -07002871 }
2872 }
2873 return rc;
2874}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002875
2876static int
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002877ip_rfc1001_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002878{
2879 int rc = 0;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002880 /*
2881 * some servers require RFC1001 sessinit before sending
2882 * negprot - BB check reconnection in case where second
2883 * sessinit is sent but no second negprot
2884 */
2885 struct rfc1002_session_packet *ses_init_buf;
2886 struct smb_hdr *smb_buf;
2887 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2888 GFP_KERNEL);
2889 if (ses_init_buf) {
2890 ses_init_buf->trailer.session_req.called_len = 32;
2891
2892 if (server->server_RFC1001_name &&
2893 server->server_RFC1001_name[0] != 0)
2894 rfc1002mangle(ses_init_buf->trailer.
2895 session_req.called_name,
2896 server->server_RFC1001_name,
2897 RFC1001_NAME_LEN_WITH_NULL);
2898 else
2899 rfc1002mangle(ses_init_buf->trailer.
2900 session_req.called_name,
2901 DEFAULT_CIFS_CALLED_NAME,
2902 RFC1001_NAME_LEN_WITH_NULL);
2903
2904 ses_init_buf->trailer.session_req.calling_len = 32;
2905
2906 /*
2907 * calling name ends in null (byte 16) from old smb
2908 * convention.
2909 */
2910 if (server->workstation_RFC1001_name &&
2911 server->workstation_RFC1001_name[0] != 0)
2912 rfc1002mangle(ses_init_buf->trailer.
2913 session_req.calling_name,
2914 server->workstation_RFC1001_name,
2915 RFC1001_NAME_LEN_WITH_NULL);
2916 else
2917 rfc1002mangle(ses_init_buf->trailer.
2918 session_req.calling_name,
2919 "LINUX_CIFS_CLNT",
2920 RFC1001_NAME_LEN_WITH_NULL);
2921
2922 ses_init_buf->trailer.session_req.scope1 = 0;
2923 ses_init_buf->trailer.session_req.scope2 = 0;
2924 smb_buf = (struct smb_hdr *)ses_init_buf;
2925
2926 /* sizeof RFC1002_SESSION_REQUEST with no scope */
Steve Frenchbe8e3b02011-04-29 05:40:20 +00002927 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002928 rc = smb_send(server, smb_buf, 0x44);
2929 kfree(ses_init_buf);
2930 /*
2931 * RFC1001 layer in at least one server
2932 * requires very short break before negprot
2933 * presumably because not expecting negprot
2934 * to follow so fast. This is a simple
2935 * solution that works without
2936 * complicating the code and causes no
2937 * significant slowing down on mount
2938 * for everyone else
2939 */
2940 usleep_range(1000, 2000);
2941 }
2942 /*
2943 * else the negprot may still work without this
2944 * even though malloc failed
2945 */
2946
2947 return rc;
2948}
2949
2950static int
2951generic_ip_connect(struct TCP_Server_Info *server)
2952{
2953 int rc = 0;
Steve French6da97912011-03-13 18:55:55 +00002954 __be16 sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002955 int slen, sfamily;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002956 struct socket *socket = server->ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002957 struct sockaddr *saddr;
2958
2959 saddr = (struct sockaddr *) &server->dstaddr;
2960
2961 if (server->dstaddr.ss_family == AF_INET6) {
2962 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2963 slen = sizeof(struct sockaddr_in6);
2964 sfamily = AF_INET6;
2965 } else {
2966 sport = ((struct sockaddr_in *) saddr)->sin_port;
2967 slen = sizeof(struct sockaddr_in);
2968 sfamily = AF_INET;
2969 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002970
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002971 if (socket == NULL) {
Rob Landleyf1d0c992011-01-22 15:44:05 -06002972 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2973 IPPROTO_TCP, &socket, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002975 cifs_dbg(VFS, "Error %d creating socket\n", rc);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002976 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002977 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002978 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002979
2980 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesf96637b2013-05-04 22:12:25 -05002981 cifs_dbg(FYI, "Socket created\n");
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002982 server->ssocket = socket;
2983 socket->sk->sk_allocation = GFP_NOFS;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002984 if (sfamily == AF_INET6)
2985 cifs_reclassify_socket6(socket);
2986 else
2987 cifs_reclassify_socket4(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002988 }
2989
Ben Greear3eb9a882010-09-01 17:06:02 -07002990 rc = bind_socket(server);
2991 if (rc < 0)
2992 return rc;
2993
Jeff Laytond5c56052008-12-01 18:42:33 -05002994 /*
2995 * Eventually check for other socket options to change from
2996 * the default. sock_setsockopt not used because it expects
2997 * user space buffer
2998 */
2999 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00003000 socket->sk->sk_sndtimeo = 5 * HZ;
Steve French6a5fa2362010-01-01 01:28:43 +00003001
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003002 /* make the bufsizes depend on wsize/rsize and max requests */
3003 if (server->noautotune) {
3004 if (socket->sk->sk_sndbuf < (200 * 1024))
3005 socket->sk->sk_sndbuf = 200 * 1024;
3006 if (socket->sk->sk_rcvbuf < (140 * 1024))
3007 socket->sk->sk_rcvbuf = 140 * 1024;
3008 }
3009
Steve French6a5fa2362010-01-01 01:28:43 +00003010 if (server->tcp_nodelay) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003011 int val = 1;
Steve French6a5fa2362010-01-01 01:28:43 +00003012 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3013 (char *)&val, sizeof(val));
3014 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -05003015 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
3016 rc);
Steve French6a5fa2362010-01-01 01:28:43 +00003017 }
3018
Joe Perchesf96637b2013-05-04 22:12:25 -05003019 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003020 socket->sk->sk_sndbuf,
3021 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
3022
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04003023 rc = socket->ops->connect(socket, saddr, slen, 0);
3024 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003025 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04003026 sock_release(socket);
3027 server->ssocket = NULL;
3028 return rc;
3029 }
3030
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003031 if (sport == htons(RFC1001_PORT))
3032 rc = ip_rfc1001_connect(server);
Steve French50c2f752007-07-13 00:33:32 +00003033
Linus Torvalds1da177e2005-04-16 15:20:36 -07003034 return rc;
3035}
3036
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003037static int
3038ip_connect(struct TCP_Server_Info *server)
3039{
Steve French6da97912011-03-13 18:55:55 +00003040 __be16 *sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003041 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3042 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
3043
3044 if (server->dstaddr.ss_family == AF_INET6)
3045 sport = &addr6->sin6_port;
3046 else
3047 sport = &addr->sin_port;
3048
3049 if (*sport == 0) {
3050 int rc;
3051
3052 /* try with 445 port at first */
3053 *sport = htons(CIFS_PORT);
3054
3055 rc = generic_ip_connect(server);
3056 if (rc >= 0)
3057 return rc;
3058
3059 /* if it failed, try with 139 port */
3060 *sport = htons(RFC1001_PORT);
3061 }
3062
3063 return generic_ip_connect(server);
3064}
3065
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003066void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
Al Viro2c6292a2011-06-17 09:05:48 -04003067 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
Steve French8af18972007-02-14 04:42:51 +00003068{
3069 /* if we are reconnecting then should we check to see if
3070 * any requested capabilities changed locally e.g. via
3071 * remount but we can not do much about it here
3072 * if they have (even if we could detect it by the following)
3073 * Perhaps we could add a backpointer to array of sb from tcon
3074 * or if we change to make all sb to same share the same
3075 * sb as NFS - then we only have one backpointer to sb.
3076 * What if we wanted to mount the server share twice once with
3077 * and once without posixacls or posix paths? */
3078 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00003079
Steve Frenchc18c8422007-07-18 23:21:09 +00003080 if (vol_info && vol_info->no_linux_ext) {
3081 tcon->fsUnixInfo.Capability = 0;
3082 tcon->unix_ext = 0; /* Unix Extensions disabled */
Joe Perchesf96637b2013-05-04 22:12:25 -05003083 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
Steve Frenchc18c8422007-07-18 23:21:09 +00003084 return;
3085 } else if (vol_info)
3086 tcon->unix_ext = 1; /* Unix Extensions supported */
3087
3088 if (tcon->unix_ext == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003089 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
Steve Frenchc18c8422007-07-18 23:21:09 +00003090 return;
3091 }
Steve French50c2f752007-07-13 00:33:32 +00003092
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003093 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
Steve French8af18972007-02-14 04:42:51 +00003094 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Joe Perchesf96637b2013-05-04 22:12:25 -05003095 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
Steve French8af18972007-02-14 04:42:51 +00003096 /* check for reconnect case in which we do not
3097 want to change the mount behavior if we can avoid it */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003098 if (vol_info == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003099 /* turn off POSIX ACL and PATHNAMES if not set
Steve French8af18972007-02-14 04:42:51 +00003100 originally at mount time */
3101 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3102 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00003103 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3104 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003105 cifs_dbg(VFS, "POSIXPATH support change\n");
Steve French8af18972007-02-14 04:42:51 +00003106 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00003107 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003108 cifs_dbg(VFS, "possible reconnect error\n");
3109 cifs_dbg(VFS, "server disabled POSIX path support\n");
Igor Mammedov11b6d642008-02-15 19:06:04 +00003110 }
Steve French8af18972007-02-14 04:42:51 +00003111 }
Steve French50c2f752007-07-13 00:33:32 +00003112
Steve French6848b732011-05-26 18:38:54 +00003113 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003114 cifs_dbg(VFS, "per-share encryption not supported yet\n");
Steve French6848b732011-05-26 18:38:54 +00003115
Steve French8af18972007-02-14 04:42:51 +00003116 cap &= CIFS_UNIX_CAP_MASK;
Steve French75865f8c2007-06-24 18:30:48 +00003117 if (vol_info && vol_info->no_psx_acl)
Steve French8af18972007-02-14 04:42:51 +00003118 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00003119 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003120 cifs_dbg(FYI, "negotiated posix acl support\n");
Al Viro2c6292a2011-06-17 09:05:48 -04003121 if (cifs_sb)
3122 cifs_sb->mnt_cifs_flags |=
3123 CIFS_MOUNT_POSIXACL;
Steve French8af18972007-02-14 04:42:51 +00003124 }
3125
Steve French75865f8c2007-06-24 18:30:48 +00003126 if (vol_info && vol_info->posix_paths == 0)
Steve French8af18972007-02-14 04:42:51 +00003127 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00003128 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003129 cifs_dbg(FYI, "negotiate posix pathnames\n");
Al Viro2c6292a2011-06-17 09:05:48 -04003130 if (cifs_sb)
3131 cifs_sb->mnt_cifs_flags |=
Steve French8af18972007-02-14 04:42:51 +00003132 CIFS_MOUNT_POSIX_PATHS;
3133 }
Steve French50c2f752007-07-13 00:33:32 +00003134
Joe Perchesf96637b2013-05-04 22:12:25 -05003135 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
Steve French8af18972007-02-14 04:42:51 +00003136#ifdef CONFIG_CIFS_DEBUG2
Steve French75865f8c2007-06-24 18:30:48 +00003137 if (cap & CIFS_UNIX_FCNTL_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003138 cifs_dbg(FYI, "FCNTL cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003139 if (cap & CIFS_UNIX_EXTATTR_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003140 cifs_dbg(FYI, "EXTATTR cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003141 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003142 cifs_dbg(FYI, "POSIX path cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003143 if (cap & CIFS_UNIX_XATTR_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003144 cifs_dbg(FYI, "XATTR cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003145 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003146 cifs_dbg(FYI, "POSIX ACL cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003147 if (cap & CIFS_UNIX_LARGE_READ_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003148 cifs_dbg(FYI, "very large read cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003149 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003150 cifs_dbg(FYI, "very large write cap\n");
Steve French6848b732011-05-26 18:38:54 +00003151 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003152 cifs_dbg(FYI, "transport encryption cap\n");
Steve French6848b732011-05-26 18:38:54 +00003153 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003154 cifs_dbg(FYI, "mandatory transport encryption cap\n");
Steve French8af18972007-02-14 04:42:51 +00003155#endif /* CIFS_DEBUG2 */
3156 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
Steve French442aa312007-09-24 20:25:46 +00003157 if (vol_info == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003158 cifs_dbg(FYI, "resetting capabilities failed\n");
Steve French442aa312007-09-24 20:25:46 +00003159 } else
Joe Perchesf96637b2013-05-04 22:12:25 -05003160 cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n");
Steve French5a44b312007-09-20 15:16:24 +00003161
Steve French8af18972007-02-14 04:42:51 +00003162 }
3163 }
3164}
3165
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003166void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3167 struct cifs_sb_info *cifs_sb)
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04003168{
Jeff Layton2de970f2010-10-06 19:51:12 -04003169 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3170
Al Viro2ced6f62011-06-17 09:20:04 -04003171 spin_lock_init(&cifs_sb->tlink_tree_lock);
3172 cifs_sb->tlink_tree = RB_ROOT;
3173
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003174 /*
Jeff Layton5eba8ab2011-10-19 15:30:26 -04003175 * Temporarily set r/wsize for matching superblock. If we end up using
3176 * new sb then client will later negotiate it downward if needed.
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003177 */
Jeff Layton5eba8ab2011-10-19 15:30:26 -04003178 cifs_sb->rsize = pvolume_info->rsize;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003179 cifs_sb->wsize = pvolume_info->wsize;
3180
Steve French3b795212008-11-13 19:45:32 +00003181 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3182 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3183 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3184 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
Joe Perchesf96637b2013-05-04 22:12:25 -05003185 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3186 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
Steve French3b795212008-11-13 19:45:32 +00003187
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05303188 cifs_sb->actimeo = pvolume_info->actimeo;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003189 cifs_sb->local_nls = pvolume_info->local_nls;
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05303190
Steve French3b795212008-11-13 19:45:32 +00003191 if (pvolume_info->noperm)
3192 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3193 if (pvolume_info->setuids)
3194 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3195 if (pvolume_info->server_ino)
3196 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3197 if (pvolume_info->remap)
3198 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3199 if (pvolume_info->no_xattr)
3200 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3201 if (pvolume_info->sfu_emul)
3202 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3203 if (pvolume_info->nobrl)
3204 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
Steve Frenchbe652442009-02-23 15:21:59 +00003205 if (pvolume_info->nostrictsync)
Steve French4717bed2009-02-24 14:44:19 +00003206 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
Steve French13a6e422008-12-02 17:24:33 +00003207 if (pvolume_info->mand_lock)
3208 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00003209 if (pvolume_info->rwpidforward)
3210 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
Steve French3b795212008-11-13 19:45:32 +00003211 if (pvolume_info->cifs_acl)
3212 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003213 if (pvolume_info->backupuid_specified) {
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05003214 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003215 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3216 }
3217 if (pvolume_info->backupgid_specified) {
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05003218 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003219 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3220 }
Steve French3b795212008-11-13 19:45:32 +00003221 if (pvolume_info->override_uid)
3222 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3223 if (pvolume_info->override_gid)
3224 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3225 if (pvolume_info->dynperm)
3226 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05303227 if (pvolume_info->fsc)
3228 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
Jeff Layton0eb8a132010-10-06 19:51:12 -04003229 if (pvolume_info->multiuser)
3230 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3231 CIFS_MOUNT_NO_PERM);
Pavel Shilovskyd39454f2011-01-24 14:16:35 -05003232 if (pvolume_info->strict_io)
3233 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
Steve French3b795212008-11-13 19:45:32 +00003234 if (pvolume_info->direct_io) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003235 cifs_dbg(FYI, "mounting share using direct i/o\n");
Steve French3b795212008-11-13 19:45:32 +00003236 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3237 }
Stefan Metzmacher736a3322010-07-30 14:56:00 +02003238 if (pvolume_info->mfsymlinks) {
3239 if (pvolume_info->sfu_emul) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003240 cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n");
Stefan Metzmacher736a3322010-07-30 14:56:00 +02003241 } else {
3242 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3243 }
3244 }
Steve French3b795212008-11-13 19:45:32 +00003245
3246 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
Joe Perchesf96637b2013-05-04 22:12:25 -05003247 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04003248}
3249
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003250static void
3251cleanup_volume_info_contents(struct smb_vol *volume_info)
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003252{
Sean Finneyb9468452011-04-11 13:19:32 +00003253 kfree(volume_info->username);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003254 kzfree(volume_info->password);
Jesper Juhl95c75452011-08-27 18:58:34 +02003255 kfree(volume_info->UNC);
Sean Finneyb9468452011-04-11 13:19:32 +00003256 kfree(volume_info->domainname);
3257 kfree(volume_info->iocharset);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003258 kfree(volume_info->prepath);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003259}
3260
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003261void
3262cifs_cleanup_volume_info(struct smb_vol *volume_info)
3263{
3264 if (!volume_info)
3265 return;
3266 cleanup_volume_info_contents(volume_info);
3267 kfree(volume_info);
3268}
3269
3270
Steve French2d6d5892009-04-09 00:36:44 +00003271#ifdef CONFIG_CIFS_DFS_UPCALL
Steve French6d3ea7e2012-11-28 22:34:41 -06003272/*
3273 * cifs_build_path_to_root returns full path to root when we do not have an
3274 * exiting connection (tcon)
3275 */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003276static char *
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003277build_unc_path_to_root(const struct smb_vol *vol,
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003278 const struct cifs_sb_info *cifs_sb)
3279{
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003280 char *full_path, *pos;
Jeff Layton839db3d2012-12-10 06:10:45 -05003281 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003282 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003283
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003284 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003285 if (full_path == NULL)
3286 return ERR_PTR(-ENOMEM);
3287
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003288 strncpy(full_path, vol->UNC, unc_len);
3289 pos = full_path + unc_len;
3290
3291 if (pplen) {
Jeff Layton1fc29ba2013-05-31 10:00:18 -04003292 *pos = CIFS_DIR_SEP(cifs_sb);
3293 strncpy(pos + 1, vol->prepath, pplen);
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003294 pos += pplen;
3295 }
3296
3297 *pos = '\0'; /* add trailing null */
Steve Frenchf87d39d2011-05-27 03:50:55 +00003298 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
Joe Perchesf96637b2013-05-04 22:12:25 -05003299 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003300 return full_path;
3301}
Sean Finneydd613942011-04-11 13:19:30 +00003302
3303/*
3304 * Perform a dfs referral query for a share and (optionally) prefix
3305 *
Sean Finney046462a2011-04-11 13:19:33 +00003306 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3307 * to a string containing updated options for the submount. Otherwise it
3308 * will be left untouched.
Sean Finneydd613942011-04-11 13:19:30 +00003309 *
3310 * Returns the rc from get_dfs_path to the caller, which can be used to
3311 * determine whether there were referrals.
3312 */
3313static int
Pavel Shilovskyb669f332012-05-27 20:21:53 +04003314expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
Sean Finneydd613942011-04-11 13:19:30 +00003315 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
Sean Finney046462a2011-04-11 13:19:33 +00003316 int check_prefix)
Sean Finneydd613942011-04-11 13:19:30 +00003317{
3318 int rc;
3319 unsigned int num_referrals = 0;
3320 struct dfs_info3_param *referrals = NULL;
3321 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3322
3323 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3324 if (IS_ERR(full_path))
3325 return PTR_ERR(full_path);
3326
3327 /* For DFS paths, skip the first '\' of the UNC */
3328 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3329
Pavel Shilovskyb669f332012-05-27 20:21:53 +04003330 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
Sean Finneydd613942011-04-11 13:19:30 +00003331 &num_referrals, &referrals,
3332 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3333
3334 if (!rc && num_referrals > 0) {
3335 char *fake_devname = NULL;
3336
3337 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3338 full_path + 1, referrals,
3339 &fake_devname);
3340
3341 free_dfs_info_array(referrals, num_referrals);
Sean Finney046462a2011-04-11 13:19:33 +00003342
Sean Finneydd613942011-04-11 13:19:30 +00003343 if (IS_ERR(mdata)) {
3344 rc = PTR_ERR(mdata);
3345 mdata = NULL;
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003346 } else {
3347 cleanup_volume_info_contents(volume_info);
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003348 rc = cifs_setup_volume_info(volume_info, mdata,
3349 fake_devname);
Sean Finneydd613942011-04-11 13:19:30 +00003350 }
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003351 kfree(fake_devname);
3352 kfree(cifs_sb->mountdata);
Sean Finney046462a2011-04-11 13:19:33 +00003353 cifs_sb->mountdata = mdata;
Sean Finneydd613942011-04-11 13:19:30 +00003354 }
3355 kfree(full_path);
3356 return rc;
3357}
Steve French2d6d5892009-04-09 00:36:44 +00003358#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003359
Jeff Layton04db79b2011-07-06 08:10:38 -04003360static int
3361cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3362 const char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003363{
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003364 int rc = 0;
Sean Finneydd613942011-04-11 13:19:30 +00003365
Jeff Layton04db79b2011-07-06 08:10:38 -04003366 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3367 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003368
Jeff Layton7586b762008-12-01 18:41:49 -05003369 if (volume_info->nullauth) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003370 cifs_dbg(FYI, "Anonymous login\n");
Jeff Layton04febab2012-01-17 16:09:15 -05003371 kfree(volume_info->username);
3372 volume_info->username = NULL;
Jeff Layton7586b762008-12-01 18:41:49 -05003373 } else if (volume_info->username) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003374 /* BB fixme parse for domain name here */
Joe Perchesf96637b2013-05-04 22:12:25 -05003375 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003376 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -05003377 cifs_dbg(VFS, "No username specified\n");
Steve French50c2f752007-07-13 00:33:32 +00003378 /* In userspace mount helper we can get user name from alternate
3379 locations such as env variables and files on disk */
Jeff Layton04db79b2011-07-06 08:10:38 -04003380 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003381 }
3382
Linus Torvalds1da177e2005-04-16 15:20:36 -07003383 /* this is needed for ASCII cp to Unicode converts */
Jeff Layton7586b762008-12-01 18:41:49 -05003384 if (volume_info->iocharset == NULL) {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003385 /* load_nls_default cannot return null */
3386 volume_info->local_nls = load_nls_default();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003387 } else {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003388 volume_info->local_nls = load_nls(volume_info->iocharset);
3389 if (volume_info->local_nls == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003390 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
Joe Perchesb6b38f72010-04-21 03:50:45 +00003391 volume_info->iocharset);
Jeff Layton04db79b2011-07-06 08:10:38 -04003392 return -ELIBACC;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003393 }
3394 }
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003395
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003396 return rc;
Jeff Layton04db79b2011-07-06 08:10:38 -04003397}
3398
3399struct smb_vol *
3400cifs_get_volume_info(char *mount_data, const char *devname)
3401{
3402 int rc;
3403 struct smb_vol *volume_info;
3404
Jeff Layton6ee95422012-11-26 11:09:57 -05003405 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
Jeff Layton04db79b2011-07-06 08:10:38 -04003406 if (!volume_info)
3407 return ERR_PTR(-ENOMEM);
3408
3409 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3410 if (rc) {
3411 cifs_cleanup_volume_info(volume_info);
3412 volume_info = ERR_PTR(rc);
3413 }
3414
3415 return volume_info;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003416}
3417
3418int
Al Viro2c6292a2011-06-17 09:05:48 -04003419cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003420{
Jeff Layton1daaae82012-03-21 06:30:40 -04003421 int rc;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003422 unsigned int xid;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003423 struct cifs_ses *ses;
Steve French96daf2b2011-05-27 04:34:02 +00003424 struct cifs_tcon *tcon;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003425 struct TCP_Server_Info *server;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003426 char *full_path;
3427 struct tcon_link *tlink;
3428#ifdef CONFIG_CIFS_DFS_UPCALL
3429 int referral_walks_count = 0;
Jeff Layton20547492011-07-09 12:21:07 -04003430#endif
Al Virodd854462011-06-17 08:24:42 -04003431
3432 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3433 if (rc)
3434 return rc;
3435
Jeff Layton20547492011-07-09 12:21:07 -04003436#ifdef CONFIG_CIFS_DFS_UPCALL
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003437try_mount_again:
3438 /* cleanup activities if we're chasing a referral */
3439 if (referral_walks_count) {
3440 if (tcon)
3441 cifs_put_tcon(tcon);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003442 else if (ses)
3443 cifs_put_smb_ses(ses);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003444
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003445 free_xid(xid);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003446 }
3447#endif
Jeff Layton1daaae82012-03-21 06:30:40 -04003448 rc = 0;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003449 tcon = NULL;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003450 ses = NULL;
3451 server = NULL;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003452 full_path = NULL;
3453 tlink = NULL;
3454
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003455 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003456
Jeff Layton63c038c2008-12-01 18:41:46 -05003457 /* get a reference to a tcp session */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003458 server = cifs_get_tcp_session(volume_info);
3459 if (IS_ERR(server)) {
3460 rc = PTR_ERR(server);
Al Virodd854462011-06-17 08:24:42 -04003461 bdi_destroy(&cifs_sb->bdi);
Jeff Layton63c038c2008-12-01 18:41:46 -05003462 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003463 }
3464
Jeff Layton36988c72010-04-24 07:57:43 -04003465 /* get a reference to a SMB session */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003466 ses = cifs_get_smb_ses(server, volume_info);
3467 if (IS_ERR(ses)) {
3468 rc = PTR_ERR(ses);
3469 ses = NULL;
Jeff Layton36988c72010-04-24 07:57:43 -04003470 goto mount_fail_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003471 }
Steve French50c2f752007-07-13 00:33:32 +00003472
Jeff Laytond00c28d2010-04-24 07:57:44 -04003473 /* search for existing tcon to this server share */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003474 tcon = cifs_get_tcon(ses, volume_info);
Jeff Laytond00c28d2010-04-24 07:57:44 -04003475 if (IS_ERR(tcon)) {
3476 rc = PTR_ERR(tcon);
3477 tcon = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003478 goto remote_path_check;
Jeff Laytond00c28d2010-04-24 07:57:44 -04003479 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003480
Steve French6848b732011-05-26 18:38:54 +00003481 /* tell server which Unix caps we support */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003482 if (cap_unix(tcon->ses)) {
Steve French6848b732011-05-26 18:38:54 +00003483 /* reset of caps checks mount to see if unix extensions
3484 disabled for just this mount */
Al Viro2c6292a2011-06-17 09:05:48 -04003485 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
Steve French6848b732011-05-26 18:38:54 +00003486 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3487 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3488 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3489 rc = -EACCES;
3490 goto mount_fail_check;
3491 }
3492 } else
3493 tcon->unix_ext = 0; /* server does not support them */
3494
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003495 /* do not care if a following call succeed - informational */
3496 if (!tcon->ipc && server->ops->qfs_tcon)
3497 server->ops->qfs_tcon(xid, tcon);
Steve Frenchd82c2df2008-11-15 00:07:26 +00003498
Pavel Shilovsky24985c52012-09-18 16:20:28 -07003499 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3500 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
Jeff Laytonf7910cb2011-05-19 16:22:58 -04003501
Jeff Layton66bfaad2011-10-19 15:30:35 -04003502 /* tune readahead according to rsize */
Jeff Layton8f714652012-05-01 17:41:49 -04003503 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
Jeff Layton03ceace2010-12-06 21:07:33 -05003504
Igor Mammedove4cce942009-02-10 14:10:26 +03003505remote_path_check:
3506#ifdef CONFIG_CIFS_DFS_UPCALL
3507 /*
3508 * Perform an unconditional check for whether there are DFS
3509 * referrals for this path without prefix, to provide support
3510 * for DFS referrals from w2k8 servers which don't seem to respond
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003511 * with PATH_NOT_COVERED to requests that include the prefix.
3512 * Chase the referral if found, otherwise continue normally.
Steve Frenchd036f502009-04-03 03:12:08 +00003513 */
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003514 if (referral_walks_count == 0) {
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003515 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3516 false);
Steve Frencheeac8042006-01-13 21:34:58 -08003517 if (!refrc) {
Steve French4523cc32007-04-30 20:13:06 +00003518 referral_walks_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003519 goto try_mount_again;
3520 }
3521 }
3522#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003523
Steve Frenchf87d39d2011-05-27 03:50:55 +00003524 /* check if a whole path is not remote */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003525 if (!rc && tcon) {
Pavel Shilovsky68889f22012-05-25 14:40:22 +04003526 if (!server->ops->is_path_accessible) {
3527 rc = -ENOSYS;
3528 goto mount_fail_check;
3529 }
Steve French6d3ea7e2012-11-28 22:34:41 -06003530 /*
3531 * cifs_build_path_to_root works only when we have a valid tcon
3532 */
3533 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003534 if (full_path == NULL) {
3535 rc = -ENOMEM;
3536 goto mount_fail_check;
3537 }
Pavel Shilovsky68889f22012-05-25 14:40:22 +04003538 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3539 full_path);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003540 if (rc != 0 && rc != -EREMOTE) {
3541 kfree(full_path);
3542 goto mount_fail_check;
3543 }
3544 kfree(full_path);
3545 }
3546
3547 /* get referral if needed */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003548 if (rc == -EREMOTE) {
3549#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003550 if (referral_walks_count > MAX_NESTED_LINKS) {
3551 /*
3552 * BB: when we implement proper loop detection,
3553 * we will remove this check. But now we need it
3554 * to prevent an indefinite loop if 'DFS tree' is
3555 * misconfigured (i.e. has loops).
3556 */
3557 rc = -ELOOP;
3558 goto mount_fail_check;
3559 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003560
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003561 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
Jeff Layton7b91e262009-07-23 15:22:30 -04003562
Sean Finneydd613942011-04-11 13:19:30 +00003563 if (!rc) {
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003564 referral_walks_count++;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003565 goto try_mount_again;
3566 }
Sean Finneydd613942011-04-11 13:19:30 +00003567 goto mount_fail_check;
Steve Frenchd036f502009-04-03 03:12:08 +00003568#else /* No DFS support, return error on mount */
3569 rc = -EOPNOTSUPP;
3570#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003571 }
3572
Jeff Layton9d002df2010-10-06 19:51:11 -04003573 if (rc)
3574 goto mount_fail_check;
3575
3576 /* now, hang the tcon off of the superblock */
3577 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3578 if (tlink == NULL) {
3579 rc = -ENOMEM;
3580 goto mount_fail_check;
3581 }
3582
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003583 tlink->tl_uid = ses->linux_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -04003584 tlink->tl_tcon = tcon;
3585 tlink->tl_time = jiffies;
3586 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3587 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3588
Jeff Layton413e6612010-10-28 13:33:38 -04003589 cifs_sb->master_tlink = tlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04003590 spin_lock(&cifs_sb->tlink_tree_lock);
3591 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3592 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton413e6612010-10-28 13:33:38 -04003593
Jeff Laytonda472fc2012-03-23 14:40:53 -04003594 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
Jeff Layton2de970f2010-10-06 19:51:12 -04003595 TLINK_IDLE_EXPIRE);
3596
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003597mount_fail_check:
3598 /* on error free sesinfo and tcon struct if needed */
3599 if (rc) {
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003600 /* If find_unc succeeded then rc == 0 so we can not end */
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003601 /* up accidentally freeing someone elses tcon struct */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003602 if (tcon)
3603 cifs_put_tcon(tcon);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003604 else if (ses)
3605 cifs_put_smb_ses(ses);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003606 else
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003607 cifs_put_tcp_session(server);
Al Virodd854462011-06-17 08:24:42 -04003608 bdi_destroy(&cifs_sb->bdi);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003609 }
3610
Linus Torvalds1da177e2005-04-16 15:20:36 -07003611out:
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003612 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003613 return rc;
3614}
3615
Jeff Layton8d1bca32011-06-11 21:17:10 -04003616/*
3617 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3618 * pointer may be NULL.
3619 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003620int
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04003621CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
Steve French96daf2b2011-05-27 04:34:02 +00003622 const char *tree, struct cifs_tcon *tcon,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003623 const struct nls_table *nls_codepage)
3624{
3625 struct smb_hdr *smb_buffer;
3626 struct smb_hdr *smb_buffer_response;
3627 TCONX_REQ *pSMB;
3628 TCONX_RSP *pSMBr;
3629 unsigned char *bcc_ptr;
3630 int rc = 0;
Jeff Layton690c5222011-01-20 13:36:51 -05003631 int length;
3632 __u16 bytes_left, count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003633
3634 if (ses == NULL)
3635 return -EIO;
3636
3637 smb_buffer = cifs_buf_get();
Steve Frenchca43e3b2009-09-01 17:20:50 +00003638 if (smb_buffer == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639 return -ENOMEM;
Steve Frenchca43e3b2009-09-01 17:20:50 +00003640
Linus Torvalds1da177e2005-04-16 15:20:36 -07003641 smb_buffer_response = smb_buffer;
3642
3643 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3644 NULL /*no tid */ , 4 /*wct */ );
Steve French1982c342005-08-17 12:38:22 -07003645
Pavel Shilovsky88257362012-05-23 14:01:59 +04003646 smb_buffer->Mid = get_next_mid(ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003647 smb_buffer->Uid = ses->Suid;
3648 pSMB = (TCONX_REQ *) smb_buffer;
3649 pSMBr = (TCONX_RSP *) smb_buffer_response;
3650
3651 pSMB->AndXCommand = 0xFF;
3652 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003653 bcc_ptr = &pSMB->Password[0];
Jeff Layton8d1bca32011-06-11 21:17:10 -04003654 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
Steve Frencheeac8042006-01-13 21:34:58 -08003655 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
Steve French7c7b25b2006-06-01 19:20:10 +00003656 *bcc_ptr = 0; /* password is null byte */
Steve Frencheeac8042006-01-13 21:34:58 -08003657 bcc_ptr++; /* skip password */
Steve French7c7b25b2006-06-01 19:20:10 +00003658 /* already aligned so no need to do it below */
Steve Frencheeac8042006-01-13 21:34:58 -08003659 } else {
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003660 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
Steve Frencheeac8042006-01-13 21:34:58 -08003661 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3662 specified as required (when that support is added to
3663 the vfs in the future) as only NTLM or the much
Steve French7c7b25b2006-06-01 19:20:10 +00003664 weaker LANMAN (which we do not send by default) is accepted
Steve Frencheeac8042006-01-13 21:34:58 -08003665 by Samba (not sure whether other servers allow
3666 NTLMv2 password here) */
Steve French7c7b25b2006-06-01 19:20:10 +00003667#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton04912d62010-04-24 07:57:45 -04003668 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
Jeff Layton3f618222013-06-12 19:52:14 -05003669 (ses->sectype == LANMAN))
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -05003670 calc_lanman_hash(tcon->password, ses->server->cryptkey,
Steve French96daf2b2011-05-27 04:34:02 +00003671 ses->server->sec_mode &
Jeff Layton4e53a3f2008-12-05 20:41:21 -05003672 SECMODE_PW_ENCRYPT ? true : false,
3673 bcc_ptr);
Steve French7c7b25b2006-06-01 19:20:10 +00003674 else
3675#endif /* CIFS_WEAK_PW_HASH */
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -06003676 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
Shirish Pargaonkar9ef59922011-10-20 13:21:59 -05003677 bcc_ptr, nls_codepage);
Steve Frencheeac8042006-01-13 21:34:58 -08003678
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003679 bcc_ptr += CIFS_AUTH_RESP_SIZE;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003680 if (ses->capabilities & CAP_UNICODE) {
Steve French7c7b25b2006-06-01 19:20:10 +00003681 /* must align unicode strings */
3682 *bcc_ptr = 0; /* null byte password */
3683 bcc_ptr++;
3684 }
Steve Frencheeac8042006-01-13 21:34:58 -08003685 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003686
Jeff Layton38d77c52013-05-26 07:01:00 -04003687 if (ses->server->sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003688 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3689
3690 if (ses->capabilities & CAP_STATUS32) {
3691 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3692 }
3693 if (ses->capabilities & CAP_DFS) {
3694 smb_buffer->Flags2 |= SMBFLG2_DFS;
3695 }
3696 if (ses->capabilities & CAP_UNICODE) {
3697 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3698 length =
Steve Frenchacbbb762012-01-18 22:32:33 -06003699 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
Steve French50c2f752007-07-13 00:33:32 +00003700 6 /* max utf8 char length in bytes */ *
Steve Frencha878fb22006-05-30 18:04:19 +00003701 (/* server len*/ + 256 /* share len */), nls_codepage);
3702 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003703 bcc_ptr += 2; /* skip trailing null */
3704 } else { /* ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003705 strcpy(bcc_ptr, tree);
3706 bcc_ptr += strlen(tree) + 1;
3707 }
3708 strcpy(bcc_ptr, "?????");
3709 bcc_ptr += strlen("?????");
3710 bcc_ptr += 1;
3711 count = bcc_ptr - &pSMB->Password[0];
Steve Frenchbe8e3b02011-04-29 05:40:20 +00003712 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3713 pSMB->hdr.smb_buf_length) + count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003714 pSMB->ByteCount = cpu_to_le16(count);
3715
Steve French133672e2007-11-13 22:41:37 +00003716 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
Jeff Layton77499812011-01-11 07:24:23 -05003717 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003718
Linus Torvalds1da177e2005-04-16 15:20:36 -07003719 /* above now done in SendReceive */
3720 if ((rc == 0) && (tcon != NULL)) {
Steve French0e0d2cf2009-05-01 05:27:32 +00003721 bool is_unicode;
3722
Linus Torvalds1da177e2005-04-16 15:20:36 -07003723 tcon->tidStatus = CifsGood;
Steve French3b795212008-11-13 19:45:32 +00003724 tcon->need_reconnect = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003725 tcon->tid = smb_buffer_response->Tid;
3726 bcc_ptr = pByteArea(smb_buffer_response);
Jeff Layton690c5222011-01-20 13:36:51 -05003727 bytes_left = get_bcc(smb_buffer_response);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003728 length = strnlen(bcc_ptr, bytes_left - 2);
Steve French0e0d2cf2009-05-01 05:27:32 +00003729 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3730 is_unicode = true;
3731 else
3732 is_unicode = false;
3733
Jeff Laytoncc20c032009-04-30 07:16:21 -04003734
Steve French50c2f752007-07-13 00:33:32 +00003735 /* skip service field (NB: this field is always ASCII) */
Steve French7f8ed422007-09-28 22:28:55 +00003736 if (length == 3) {
3737 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3738 (bcc_ptr[2] == 'C')) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003739 cifs_dbg(FYI, "IPC connection\n");
Steve French7f8ed422007-09-28 22:28:55 +00003740 tcon->ipc = 1;
3741 }
3742 } else if (length == 2) {
3743 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3744 /* the most common case */
Joe Perchesf96637b2013-05-04 22:12:25 -05003745 cifs_dbg(FYI, "disk share connection\n");
Steve French7f8ed422007-09-28 22:28:55 +00003746 }
3747 }
Steve French50c2f752007-07-13 00:33:32 +00003748 bcc_ptr += length + 1;
Jeff Laytoncc20c032009-04-30 07:16:21 -04003749 bytes_left -= (length + 1);
Zhao Hongjiang46b51d02013-06-24 01:57:47 -05003750 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
Jeff Laytoncc20c032009-04-30 07:16:21 -04003751
3752 /* mostly informational -- no need to fail on error here */
Jeff Layton90a98b22009-07-20 13:40:52 -04003753 kfree(tcon->nativeFileSystem);
Steve Frenchacbbb762012-01-18 22:32:33 -06003754 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
Steve French0e0d2cf2009-05-01 05:27:32 +00003755 bytes_left, is_unicode,
Jeff Laytoncc20c032009-04-30 07:16:21 -04003756 nls_codepage);
3757
Joe Perchesf96637b2013-05-04 22:12:25 -05003758 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003759
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003760 if ((smb_buffer_response->WordCount == 3) ||
Steve French1a4e15a2006-10-12 21:33:51 +00003761 (smb_buffer_response->WordCount == 7))
3762 /* field is in same location */
Steve French39798772006-05-31 22:40:51 +00003763 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3764 else
3765 tcon->Flags = 0;
Joe Perchesf96637b2013-05-04 22:12:25 -05003766 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003767 } else if ((rc == 0) && tcon == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003768 /* all we need to save for IPC$ connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003769 ses->ipc_tid = smb_buffer_response->Tid;
3770 }
3771
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +00003772 cifs_buf_release(smb_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003773 return rc;
3774}
3775
Al Viro2e32cf52013-10-03 12:53:37 -04003776static void delayed_free(struct rcu_head *p)
3777{
3778 struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu);
3779 unload_nls(sbi->local_nls);
3780 kfree(sbi);
3781}
3782
Al Viro2a9b9952011-06-17 09:27:16 -04003783void
3784cifs_umount(struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003785{
Jeff Laytonb647c352010-10-28 11:16:44 -04003786 struct rb_root *root = &cifs_sb->tlink_tree;
3787 struct rb_node *node;
3788 struct tcon_link *tlink;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003789
Jeff Layton2de970f2010-10-06 19:51:12 -04003790 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3791
Jeff Laytonb647c352010-10-28 11:16:44 -04003792 spin_lock(&cifs_sb->tlink_tree_lock);
3793 while ((node = rb_first(root))) {
3794 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3795 cifs_get_tlink(tlink);
3796 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3797 rb_erase(node, root);
Steve French50c2f752007-07-13 00:33:32 +00003798
Jeff Laytonb647c352010-10-28 11:16:44 -04003799 spin_unlock(&cifs_sb->tlink_tree_lock);
3800 cifs_put_tlink(tlink);
3801 spin_lock(&cifs_sb->tlink_tree_lock);
3802 }
3803 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003804
Al Virodd854462011-06-17 08:24:42 -04003805 bdi_destroy(&cifs_sb->bdi);
Al Virod757d712011-06-17 09:42:43 -04003806 kfree(cifs_sb->mountdata);
Al Viro2e32cf52013-10-03 12:53:37 -04003807 call_rcu(&cifs_sb->rcu, delayed_free);
Steve French50c2f752007-07-13 00:33:32 +00003808}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003809
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003810int
3811cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003812{
3813 int rc = 0;
Jeff Layton198b5682010-04-24 07:57:48 -04003814 struct TCP_Server_Info *server = ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003815
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003816 if (!server->ops->need_neg || !server->ops->negotiate)
3817 return -ENOSYS;
3818
Jeff Layton198b5682010-04-24 07:57:48 -04003819 /* only send once per connect */
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003820 if (!server->ops->need_neg(server))
Jeff Layton198b5682010-04-24 07:57:48 -04003821 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003822
Pavel Shilovsky45275782012-05-17 17:53:29 +04003823 set_credits(server, 1);
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003824
3825 rc = server->ops->negotiate(xid, ses);
Jeff Layton198b5682010-04-24 07:57:48 -04003826 if (rc == 0) {
3827 spin_lock(&GlobalMid_Lock);
Jeff Layton7fdbaa12011-06-10 16:14:57 -04003828 if (server->tcpStatus == CifsNeedNegotiate)
Jeff Layton198b5682010-04-24 07:57:48 -04003829 server->tcpStatus = CifsGood;
3830 else
3831 rc = -EHOSTDOWN;
3832 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003833 }
Steve French26b994f2008-08-06 05:11:33 +00003834
Jeff Layton198b5682010-04-24 07:57:48 -04003835 return rc;
3836}
Steve French26b994f2008-08-06 05:11:33 +00003837
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003838int
3839cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3840 struct nls_table *nls_info)
Jeff Layton198b5682010-04-24 07:57:48 -04003841{
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003842 int rc = -ENOSYS;
Jeff Layton198b5682010-04-24 07:57:48 -04003843 struct TCP_Server_Info *server = ses->server;
3844
Jeff Layton198b5682010-04-24 07:57:48 -04003845 ses->capabilities = server->capabilities;
Steve French26b994f2008-08-06 05:11:33 +00003846 if (linuxExtEnabled == 0)
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003847 ses->capabilities &= (~server->vals->cap_unix);
Steve French20418ac2009-04-30 16:13:32 +00003848
Joe Perchesf96637b2013-05-04 22:12:25 -05003849 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
Steve French96daf2b2011-05-27 04:34:02 +00003850 server->sec_mode, server->capabilities, server->timeAdj);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04003851
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003852 if (server->ops->sess_setup)
3853 rc = server->ops->sess_setup(xid, ses, nls_info);
3854
Shirish Pargaonkard4e63bd2013-08-29 08:35:09 -05003855 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -05003856 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003857
Linus Torvalds1da177e2005-04-16 15:20:36 -07003858 return rc;
3859}
3860
Jeff Layton8a8798a2012-01-17 16:09:15 -05003861static int
3862cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3863{
Jeff Layton3f618222013-06-12 19:52:14 -05003864 vol->sectype = ses->sectype;
3865
3866 /* krb5 is special, since we don't need username or pw */
3867 if (vol->sectype == Kerberos)
Jeff Layton8a8798a2012-01-17 16:09:15 -05003868 return 0;
Jeff Layton8a8798a2012-01-17 16:09:15 -05003869
3870 return cifs_set_cifscreds(vol, ses);
3871}
3872
Steve French96daf2b2011-05-27 04:34:02 +00003873static struct cifs_tcon *
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003874cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
Jeff Layton9d002df2010-10-06 19:51:11 -04003875{
Jeff Layton8a8798a2012-01-17 16:09:15 -05003876 int rc;
Steve French96daf2b2011-05-27 04:34:02 +00003877 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3878 struct cifs_ses *ses;
3879 struct cifs_tcon *tcon = NULL;
Jeff Layton9d002df2010-10-06 19:51:11 -04003880 struct smb_vol *vol_info;
Jeff Layton9d002df2010-10-06 19:51:11 -04003881
3882 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
Dan Carpenter803ab972012-01-24 11:39:22 +03003883 if (vol_info == NULL)
3884 return ERR_PTR(-ENOMEM);
Jeff Layton9d002df2010-10-06 19:51:11 -04003885
Jeff Layton9d002df2010-10-06 19:51:11 -04003886 vol_info->local_nls = cifs_sb->local_nls;
3887 vol_info->linux_uid = fsuid;
3888 vol_info->cred_uid = fsuid;
3889 vol_info->UNC = master_tcon->treeName;
3890 vol_info->retry = master_tcon->retry;
3891 vol_info->nocase = master_tcon->nocase;
3892 vol_info->local_lease = master_tcon->local_lease;
3893 vol_info->no_linux_ext = !master_tcon->unix_ext;
Jeff Layton28e11bd2013-05-26 07:01:00 -04003894 vol_info->sectype = master_tcon->ses->sectype;
3895 vol_info->sign = master_tcon->ses->sign;
Jeff Layton9d002df2010-10-06 19:51:11 -04003896
Jeff Layton8a8798a2012-01-17 16:09:15 -05003897 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3898 if (rc) {
3899 tcon = ERR_PTR(rc);
3900 goto out;
3901 }
Jeff Layton9d002df2010-10-06 19:51:11 -04003902
3903 /* get a reference for the same TCP session */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303904 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003905 ++master_tcon->ses->server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303906 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003907
3908 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3909 if (IS_ERR(ses)) {
Steve French96daf2b2011-05-27 04:34:02 +00003910 tcon = (struct cifs_tcon *)ses;
Jeff Layton9d002df2010-10-06 19:51:11 -04003911 cifs_put_tcp_session(master_tcon->ses->server);
3912 goto out;
3913 }
3914
3915 tcon = cifs_get_tcon(ses, vol_info);
3916 if (IS_ERR(tcon)) {
3917 cifs_put_smb_ses(ses);
3918 goto out;
3919 }
3920
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003921 if (cap_unix(ses))
Jeff Layton9d002df2010-10-06 19:51:11 -04003922 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3923out:
Jeff Layton8a8798a2012-01-17 16:09:15 -05003924 kfree(vol_info->username);
3925 kfree(vol_info->password);
Jeff Layton9d002df2010-10-06 19:51:11 -04003926 kfree(vol_info);
3927
3928 return tcon;
3929}
3930
Steve French96daf2b2011-05-27 04:34:02 +00003931struct cifs_tcon *
Jeff Layton9d002df2010-10-06 19:51:11 -04003932cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3933{
3934 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3935}
3936
3937static int
3938cifs_sb_tcon_pending_wait(void *unused)
3939{
3940 schedule();
3941 return signal_pending(current) ? -ERESTARTSYS : 0;
3942}
3943
Jeff Laytonb647c352010-10-28 11:16:44 -04003944/* find and return a tlink with given uid */
3945static struct tcon_link *
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003946tlink_rb_search(struct rb_root *root, kuid_t uid)
Jeff Laytonb647c352010-10-28 11:16:44 -04003947{
3948 struct rb_node *node = root->rb_node;
3949 struct tcon_link *tlink;
3950
3951 while (node) {
3952 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3953
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003954 if (uid_gt(tlink->tl_uid, uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003955 node = node->rb_left;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003956 else if (uid_lt(tlink->tl_uid, uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003957 node = node->rb_right;
3958 else
3959 return tlink;
3960 }
3961 return NULL;
3962}
3963
3964/* insert a tcon_link into the tree */
3965static void
3966tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3967{
3968 struct rb_node **new = &(root->rb_node), *parent = NULL;
3969 struct tcon_link *tlink;
3970
3971 while (*new) {
3972 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3973 parent = *new;
3974
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003975 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003976 new = &((*new)->rb_left);
3977 else
3978 new = &((*new)->rb_right);
3979 }
3980
3981 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3982 rb_insert_color(&new_tlink->tl_rbnode, root);
3983}
3984
Jeff Layton9d002df2010-10-06 19:51:11 -04003985/*
3986 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3987 * current task.
3988 *
3989 * If the superblock doesn't refer to a multiuser mount, then just return
3990 * the master tcon for the mount.
3991 *
Suresh Jayaraman6ef933a2010-11-03 10:53:49 +05303992 * First, search the rbtree for an existing tcon for this fsuid. If one
Jeff Layton9d002df2010-10-06 19:51:11 -04003993 * exists, then check to see if it's pending construction. If it is then wait
3994 * for construction to complete. Once it's no longer pending, check to see if
3995 * it failed and either return an error or retry construction, depending on
3996 * the timeout.
3997 *
3998 * If one doesn't exist then insert a new tcon_link struct into the tree and
3999 * try to construct a new one.
4000 */
4001struct tcon_link *
4002cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4003{
4004 int ret;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08004005 kuid_t fsuid = current_fsuid();
Jeff Layton9d002df2010-10-06 19:51:11 -04004006 struct tcon_link *tlink, *newtlink;
4007
4008 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4009 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4010
4011 spin_lock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04004012 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04004013 if (tlink)
4014 cifs_get_tlink(tlink);
4015 spin_unlock(&cifs_sb->tlink_tree_lock);
4016
4017 if (tlink == NULL) {
4018 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4019 if (newtlink == NULL)
4020 return ERR_PTR(-ENOMEM);
Jeff Laytonb647c352010-10-28 11:16:44 -04004021 newtlink->tl_uid = fsuid;
Jeff Layton9d002df2010-10-06 19:51:11 -04004022 newtlink->tl_tcon = ERR_PTR(-EACCES);
4023 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4024 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4025 cifs_get_tlink(newtlink);
4026
Jeff Layton9d002df2010-10-06 19:51:11 -04004027 spin_lock(&cifs_sb->tlink_tree_lock);
4028 /* was one inserted after previous search? */
Jeff Laytonb647c352010-10-28 11:16:44 -04004029 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04004030 if (tlink) {
4031 cifs_get_tlink(tlink);
4032 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04004033 kfree(newtlink);
4034 goto wait_for_construction;
4035 }
Jeff Layton9d002df2010-10-06 19:51:11 -04004036 tlink = newtlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04004037 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4038 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04004039 } else {
4040wait_for_construction:
4041 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4042 cifs_sb_tcon_pending_wait,
4043 TASK_INTERRUPTIBLE);
4044 if (ret) {
4045 cifs_put_tlink(tlink);
4046 return ERR_PTR(ret);
4047 }
4048
4049 /* if it's good, return it */
4050 if (!IS_ERR(tlink->tl_tcon))
4051 return tlink;
4052
4053 /* return error if we tried this already recently */
4054 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4055 cifs_put_tlink(tlink);
4056 return ERR_PTR(-EACCES);
4057 }
4058
4059 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4060 goto wait_for_construction;
4061 }
4062
4063 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4064 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4065 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4066
4067 if (IS_ERR(tlink->tl_tcon)) {
4068 cifs_put_tlink(tlink);
4069 return ERR_PTR(-EACCES);
4070 }
4071
4072 return tlink;
4073}
Jeff Layton2de970f2010-10-06 19:51:12 -04004074
4075/*
4076 * periodic workqueue job that scans tcon_tree for a superblock and closes
4077 * out tcons.
4078 */
4079static void
4080cifs_prune_tlinks(struct work_struct *work)
4081{
4082 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4083 prune_tlinks.work);
Jeff Laytonb647c352010-10-28 11:16:44 -04004084 struct rb_root *root = &cifs_sb->tlink_tree;
4085 struct rb_node *node = rb_first(root);
4086 struct rb_node *tmp;
4087 struct tcon_link *tlink;
Jeff Layton2de970f2010-10-06 19:51:12 -04004088
Jeff Laytonb647c352010-10-28 11:16:44 -04004089 /*
4090 * Because we drop the spinlock in the loop in order to put the tlink
4091 * it's not guarded against removal of links from the tree. The only
4092 * places that remove entries from the tree are this function and
4093 * umounts. Because this function is non-reentrant and is canceled
4094 * before umount can proceed, this is safe.
4095 */
4096 spin_lock(&cifs_sb->tlink_tree_lock);
4097 node = rb_first(root);
4098 while (node != NULL) {
4099 tmp = node;
4100 node = rb_next(tmp);
4101 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4102
4103 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4104 atomic_read(&tlink->tl_count) != 0 ||
4105 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4106 continue;
4107
4108 cifs_get_tlink(tlink);
4109 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4110 rb_erase(tmp, root);
4111
Jeff Layton2de970f2010-10-06 19:51:12 -04004112 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04004113 cifs_put_tlink(tlink);
4114 spin_lock(&cifs_sb->tlink_tree_lock);
4115 }
4116 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton2de970f2010-10-06 19:51:12 -04004117
Jeff Laytonda472fc2012-03-23 14:40:53 -04004118 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
Jeff Layton2de970f2010-10-06 19:51:12 -04004119 TLINK_IDLE_EXPIRE);
4120}